Police in Las Vegas say at least 58 people have been killed in what may be the deadliest mass shooting in U.S. history.
Officials said on October 2 that a gunman, named as 64-year-old Nevada resident Stephen Paddock, opened fire with an automatic rifle from the 32nd floor of the Mandalay Bay hotel toward an outdoor country-music festival late on October 1.
Authorities said he fired for several minutes before he killed himself as officers stormed the room, where 10 guns were found.
Calling the mass shooting "an act of pure evil," President Donald Trump said that the country was joined together in "sadness, shock, and grief."
Trump praised the efforts of the emergency services, saying their "miraculous" speed saved lives, and announced he would travel on October 3 to Las Vegas.
The extremist group Islamic State (IS) later claimed responsibility for the attack through its Amaq news agency, and said the shooter had converted to Islam "a few months ago." It provided no evidence.
However, the FBI said that the shooter had no connection to an international terrorist group.
The authorities said they had located 62-year-old Marilou Danley, who apparently was Paddock's roommate and who was wanted as a person of interest in this incident.
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The death toll, which police said was preliminary and tentative, would surpass the record toll of 49 people killed by a gunman at a nightclub in Orlando, Florida in June 2016.
The perpetrator of the attack, who was killed in a shoot-out with the police, had pledged allegiance to IS, which later claimed responsibility.