The person behind the bombing of the Manchester Arena at the end of an Ariana Grande concert died in the attack, police have said.

The death toll has also increased from 19 to 22, with a reported 59 more suffering various degrees of injuries.

Chief Constable Ian Hopkins said forensic investigations are continuing as police try to determine if the attacker had accomplices.

ALSO: 19 dead as bomb explodes at Ariana Grande concert in Manchester

He did not provide any information about the individual who detonated the device.

Police say some 400 officers were deployed overnight to help with the investigation. Officials say children were among the victims of Monday’s explosion.

There was panic after the explosion, which struck around 10:30 p.m. (2130 GMT) Monday night as Grande was ending the concert, part of her Dangerous Woman Tour.

The singer, who was not injured, tweeted hours later: “Broken. From the bottom of my heart, I am so so sorry. I don’t have words.”