|Dozens of properties in the area have been evacuated|
Police negotiators are at the scene and say they are dealing with a hostage situation in Shaw, near Oldham.
They were called at 3.15pm and are continuing to engage with him to try to bring the situation to a "safe resolution".
Some 44 homes have been evacuated.
Chief Superintendent Neil Evans said: "We, along with our partners, are working to bring this incident to a safe resolution and I want to reiterate that our priority is the safety of all those involved."
He went on to thank members of the public for their co-operation.
A help and information point has been set up at the Shaw Lifelong Learning Centre on the town's high street.