Three teenagers have been arrested and a knife seized after scenes of 'violent disorder' in Piccadilly Gardens last night.
A large number of police swooped on the square after reports of a 'large group causing anti-social behaviour.'
Describing the scene, one witness wrote on Twitter:
Another tweeted police:
A spokesperson for Greater Manchester Police said three teenagers were arrested.
A 16-year-old boy and a 15-year-old girl were arrested on suspicion of violent disorder and a 15-year-old boy on suspicion of possession of an offensive weapon.
A knife was later recovered from a bin, police added.