At least 22 people have died and 59 more were injured after a terrorist bombing tore through an Ariana Grande concert in Manchester, police have said.
Mr Hopkins said: "This has been the most horrific incident we have had to face in Greater Manchester and one that we all hoped we would never see.
Grande, the US singer who finished performing minutes before the blast, said she had been left "broken" by the events.
"We believe the attacker was carrying an improvised explosive device which he detonated, causing this atrocity."It is the worst terror attack in the UK since 56 people were killed in the 7 July London bombings in 2005.