Councillor Nigel Murphy, Deputy Leader of Manchester City Council, said: "We are aware of an incident at the Arndale Centre this morning. Our thoughts are with those who have been injured."
"This incident is under control and Greater Manchester Police and other emergency services are at the scene. It would be helpful if people could stay away from the scene to allow them to do their work. We would like to thank the public for their co-operation and of course to thank the police and others who are managing this situation.
"We would encourage people not to speculate about this incident but to refer to trusted official sources for updates."