At least two armed response units have been seen outside Manchester Arndale as officers respond to an incident this afternoon.
Multiple police cars and vans are outside the shopping centre, at the Withy Grove end.
Tactical Aid Unit officers and an ambulance have also been seen in attendance, with paramedics seen inside the Arndale.
Some emergency services appear to be focusing their work on the upper levels of the Arndale car park.
Further details about the incident are yet to be confirmed.
GMP has been approached for details.