UPDATE: 8-year-old girl among victims in Manchester terror attack
Children were among 22 people killed in a suicide attack after an Ariana Grande concert at Britain's Manchester Arena, police said early Tuesday.
The bomber also died when he detonated an improvised explosive device near one of the venue's exits at 10:33 p.m. local time (5:33 p.m. ET) on Monday, according to authorities.
Eight-year-old Saffie Rose Roussos was among the fatalities, according to her school.
Officials said 59 other people were wounded, including some who suffered life-threatening injuries. Many others remained missing.
ISIS claimed responsibility for the attack but produced no evidence. Earlier, a 23-year-old man was arrested in Manchester in connection with the attack.
The pop star's fan base is primarily girls and teenagers, so the venue was packed full of families.
The blast sparked a nightlong search for loved ones as frantic parents tried to locate their children and groups of friends scattered by the explosion sought each other.
Video shot inside the 21,000-capacity venue showed teenagers screaming as they made their way out amid a sea of pink balloons. Some fans were still wearing the singer and former Nickelodeon TV actress' trademark kitten ears as they fled.
"We have been treating this as a terrorist incident," Greater Manchester Police Chief Constable Ian Hopkins told reporters. "Our priority is to establish whether he was acting alone or as part of a network."