Twenty-two people, including children, have been killed and 59 injured in a suicide attack at Manchester Arena.The blast happened on Monday night at the end of a concert by the US singer Ariana Grande.

Greater Manchester Police said the lone male attacker, who died in the blast, was carrying an improvised explosive device which he detonated.

Relatives are using social media to hunt for missing loved ones.

Chief Constable Ian Hopkins said it was “the most horrific incident” Greater Manchester had ever faced.

Eyewitnesses described seeing metal nuts and bolts among the debris, and spoke about the fear and confusion that gripped those caught up in the events.

The explosion occurred shortly after Ariana Grande left the stage at the arena – the city’s largest indoor venue with a concert capacity of around 21,000.

The 23-year-old American TV teen actress-turned-singer – has a strong following among teenage girls and children.

She tweeted: “broken. from the bottom of my heart, i am so so sorry. i don’t have words.”