Manchester's Arndale shopping centre evacuated, witnesses heard "big bang"

People rush out of the Arndale shopping centre as it is evacuated in Manchester. (Reuters)

A shopping centre in Manchester, England, was evacuated and witnesses said they heard a "big bang" on Tuesday, just hours after a suicide bomber killed 22 people and injured 59 in the same area of the city.

Scores of people ran away from the centre, a Reuters witness said.

"There are people coming out holding hands," a Reuters photographer said.

Great Manchester Police would not comment when contacted for Reuters.