MANCHESTER, England (AP) - Manchester police say the man who set off an improvised explosive device at an Ariana Grande concert in northern England died in the attack.

Police said Tuesday 22 people died in the attack Monday night. It wasn't clear if that included the suspected suicide bomber. Dozens more were injured.

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

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