Police said a a 23-year-old man was arrested in South Manchester in connection with the attack. No other details were available.

Man, 23, arrested in Connection with Suicide Bombing by GM Police

With regards to last night’s incident at the Manchester arena, we can confirm we have arrested a 23-year-old man in South Manchester.

With regards to last night’s incident at the Manchester arena, we can confirm we have arrested a 23-year-old man in South Manchester.

— G M Police (@gmpolice) 23 May 2017

The death toll in the deadly suicide bombing at a concert by U.S. singer Ariana Grande in the heart of Manchester, northern England, climbed to 22 people Tuesday. Children were among the dead.

Fifty-nine others were injured in the blast at 10.33 pm local time Monday as the concert ended. Greater Manchester Police are treating the incident as a terror attack. The attacker died at the scene.

Police said they believe at this stage that one man carried out the attack, but are trying to establish if he was working alone of as part of a network. Nobody has claimed responsibility.

Prime Minister Theresa May said authorities believe they know the attacker’s identity, but did not name him. She will travel to Manchester to meet with police, the mayor and emergency services Tuesday.