A senior member of Greater Manchester police has warned the drunken behaviour has become so bad, public safety is "at crisis point" and "sooner or later something horrific is going to happen".
I would not be there past midnight now. I do not believe it is safe there. The situation is at crisis point.
We have got the fastest-growing night-time economy outside London with a new bar opening every weekend. There are a quarter of a million people coming into the city centre to enjoy themselves.
But at four in the morning we will have just half a dozen police officers on duty in the city centre, or even as few as four officers, which is beyond belief.
Cops are getting called to nightclubs to break up fights at 6am on a Sunday morning....Sooner or later something horrific is going to happen.
More top news
James Deen, one of the world's most famous porn stars, denies allegations of sexual abuse made by several women, including former partners.
The Good Morning Britain team have been showing support for Text Santa by performing their own version of the Wham! hit Last Christmas.
A seven-month-old baby was shot and killed when a shotgun belonging to his mother's boyfriend went off in their living room, police say.