Nine explosions hit multiple churches, hotels and other locations in Sri Lanka on Easter Sunday, killing nearly 300 people and injuring hundreds more, according to The Associated Press and other media outlets. >> Read more trending news Here are the latest updates: Update 11:20 a.m. EDT April 22: U.S. Secretary of State Mike Pompeo on Monday mourned the victims of Sunday’s bomb attacks in Sri Lanka and promised the government would provide “all possible assistance” to Americans and Sri Lankans alike. >> Sri Lanka attacks: Who are the National Thowheed Jamath? “We urge that any evil-doers be brought to justice expeditiously and America is prepared to support that,” he Pompeo said. “We also stand with the millions of Sri Lankas who support the freedom of their fellow citizens to worship as they please.” Pompeo confirmed that Americans were among those killed in Sunday’s attack, though he didn’t specify the number of American victims. “It’s heartbreaking that a country which has strived so hard for peace in recent years has been targeted by these terrorists,” he said. >> Sri Lanka attack: Danish billionaire loses three of his four children in bombings Update 9:50 am. EDT April 22: A Denver man has been identified as one of the nearly 300 people killed Sunday in bombings in Sri Lanka, his employer confirmed Monday. Dieter Kowalski worked as senior leader of the operation technical services team for Pearson, an education management company. Though the company is based in England, Kowalski worked in Pearson’s Denver office, the Milwaukee Journal-Sentinel reported. “Colleagues who knew Dieter well talk about how much fun he was to be around, how big-hearted and full-spirited he was,” Pearson CEO John Fallon said in a statement shared with company employees and posted Monday on LinkedIn. “They tell of a man to whom we could give our ugliest and most challenging of engineering problems, knowing full well that he would jump straight in and help us figure it out. Dieter, they tell me, was never happier than cheer-leading for our customers and our company and inspiring people in the best way he knew how – by helping them to fix things and doing it with joy, happiness and grace.” Fallon said Kowalski died shortly after arriving at his hotel Sunday for a business trip. Update 7:55 a.m. EDT April 22: Three children of Anders Holch Povlsen, who owns Bestseller clothing, were killed in Sunday’s attacks, The Associated Press is reporting. The 46-year-old Danish billionaire, who is also the largest shareholder in ASOS, and his family were on vacation in Sri Lanka, the AP reported. Authorities said 39 foreigners were among the 290 people killed in Sunday’s attacks. Meanwhile, a vehicle parked near St. Anthony’s Shrine, one of the churches that was bombed Sunday, exploded Monday as police tried to defuse three bombs inside, according to the AP. At least 87 bomb detonators have been found in Colombo, officials said. Police have detained at least 24 suspects in connection with Sunday’s bombings. Update 5:15 a.m. EDT April 22: Government officials said the National Thowheed, a Sri Lankan militant group, was responsible for Sunday’s deadly attacks, the Guardian is reporting. However, a government spokesman said an “international network” helped the attackers. Seven suicide bombers caused six of the nine explosions Sunday, a forensic analyst told The Associated Press. Authorities also said a second Chinese citizen and two Australian citizens were among those killed in Sunday’s attacks. So far, the dead include citizens of the United States, India, Britain, China, Australia, Japan and Portugal, the AP reported. Meanwhile, a Sri Lanka military official said crews defused a homemade pipe bomb discovered late Sunday on a road to the airport outside Colombo, the AP reported. Update 12:10 a.m. EDT April 22: The death toll in the bombings has increased to 290 and more than 500 people have been wounded, according to police spokesman Ruwan Gunasekara. Among those killed are five Indians, who were identified in tweets from India’s external affairs minister Sushma Swaraj and the Indian High Commission in Sri Lanka, The AP reported. China and Portugal also said they lost citizens, and the U.S. said “several” Americans were also killed in the bombings. The AP reported Sri Lankan officials said they would examine reports that intelligence failed to heed or detect warnings of a possible suicide attack. “Some intelligence officers were aware of this incidence,” Telecommunications Minister Harin Fernando said in a tweet, according to The AP. “Therefore there was a delay in action. Serious action needs to be taken as to why this warning was ignored.” Update 9:50 p.m. EDT April 21: Japan has confirmed at least one citizen death and four injuries from the bombings. The country has issued a safety warning to Japanese people in the country, telling them to avoid mosques, churches and public places like clubs, malls and government offices, The AP reported. Foreign Minister Taro Kono expressed solidarity with Sri Lanka and sent his condolences to victims of the explosions. He also said Japan was committed to “combating terrorism.” Update 5:40 p.m. EDT April 21: The Associated Press reported that, according to internet censorship monitoring group NetBlocks, social media has been blocked across the country after the attacks. Most services, including YouTube, WhatsApp, Instagram, Snapchat and Facebook have been temporarily blacked out to curb false information spread, according to Sri Lankan officials. According to NetBlocks, such blackouts are usually ineffective. Related: Sri Lanka explosions: Sri Lanka shuts down social media in wake of Easter attacks “We are aware of the government’s statement regarding the temporary blocking of social media platforms,” Facebook, which owns Instagram and WhatsApp, said in a statement to The AP. “People rely on our services to communicate with their loved ones and we are committed to maintaining our services and helping the community and the country during this tragic time.” Update 3:28 p.m. EDT April 21: Police have 13 suspects in custody, impounded a vehicle they believed was used by suspects and located a safe house used by the attackers. Related: Photos: Easter Sunday blasts at Sri Lanka churches, hotels kill dozens No one has claimed responsibility for what Sri Lankan officials have described as a terrorist attack by religious extremists. Update 9:28 a.m. EDT April 21: Police have so far arrested three people in connection to the blasts, The Guardian reported. A motive for the bombings is still unclear, investigators said. Update 8:46 a.m. EDT April 21: At least 207 people were killed and 450 hurt in Sunday’s attacks, The Associated Press is reporting. Officials said eight blasts targeted three churches, three hotels, a guesthouse and an area near a Dematagoda overpass, the AP reported. Authorities reportedly have arrested seven people in connection with the incidents. Update 8:07 a.m. EDT April 21: Sri Lankan officials say at least 190 people, including at least 27 foreigners and two police officers, were killed in Sunday’s attacks, The Associated Press is reporting. Seven people have been arrested in connection with the eight explosions, which rocked at least three churches and three hotels, as well as a guesthouse, officials said. Update 7:35 a.m. EDT April 21: President Donald Trump tweeted condolences to the Sri Lankan people Sunday morning. “The United States offers heartfelt condolences to the great people of Sri Lanka,” Trump tweeted. “We stand ready to help!” Update 7:19 a.m. EDT April 21: Hours after explosions at Sri Lankan churches and hotels left dozens dead and hundreds more injured, Pope Francis prayed for the victims during his annual Easter message at the Vatican. Related: Sri Lanka explosions: Pope denounces attacks during Easter blessing “I wish to express my heartfelt closeness to the Christian community (of Sri Lanka), wounded as it was gathered in prayer, and to all the victims of such cruel violence,” Francis told the crowd in St. Peter’s Square, according to Vatican News. He later added: “I entrust to the Lord all those who have tragically perished, and I pray for the injured and all those who suffer as a result of this tragic event.” Every year after leading Easter Mass, the pope delivers an “Urbi et Orbi” (“to the city and the world”) message, which addresses global issues and conflicts. Update 5:32 a.m. EDT April 21: Two more blasts have been reported in Sri Lanka. A seventh explosion hit a hotel in Dehiwala, and an eighth blast was reported in the capital, Agence France-Presse is reporting. Update 4:20 a.m. EDT April 21: At least 156 people were killed in blasts at three churches and three hotels in Sri Lanka, Agence France-Presse is reporting. The dead include 35 foreigners, officials said. Update 3:34 a.m. EDT April 21: At least 137 people were killed in blasts at three churches and three hotels in Sri Lanka, Agence France-Presse is reporting. The dead include 45 people in Colombo, 67 in Negombo and 25 in Batticaloa, officials said. At least nine of the people killed were foreigners, the news agency reported. More than 500 people were hurt in the explosions, according to The Associated Press. Original report: Explosions hit three churches and three hotels in Sri Lanka on Easter Sunday, killing dozens of people and injuring nearly 300 more, news outlets are reporting. According to The Associated Press, blasts occurred Sunday morning at St. Anthony’s Shrine in Colombo, St. Sebastian’s Church in Negombo and a church in Batticaloa. Explosions also rocked the Kingsbury, Cinnamon Grand and Shangri La hotels in Colombo, the BBC reported. The Agence France-Presse news agency said 52 people died in the blasts. At least 283 people were taken to the hospital, the AP reported. Suicide bombers may have caused at least two of the church blasts, a security official told the AP. The Associated Press contributed to this report.