A woman has been arrested in connection with the Manchester Arena suicide bombing following an armed raid on a block of flats in Blackley, in the north of the city, Greater Manchester Police said.
Another witness described hearing loud bangs as police stormed the block of flats.
Alex Finnie, 54, said armed police and "men who looked like soldiers" were involved in the swoop, which he believed was on the 12th floor.
He heard a noise which sounded like windows being blown out as the police entered the flat.
He then saw a woman with dark hair and wearing a blue shirt with her hands cuffed behind her back and pressed up against a window.
He told the Press Association:
The woman was driven away in a police van, he said, adding that armed police were preventing residents from accessing the floor.