Flats have been evacuated in Salford as police respond to reports of a concern for welfare.
Police and fire crews were scrambled to Hall Bank in Eccles at around 5pm this afternoon.
The road has been taped off outside a block of flats.
One woman who lived nearby tweeted: "Tactical aid in Eccles.
"Apparently near the canal. Fire. Police. And Apparently flats evacuated.
"It’s like opposite my house. Scary."
Photos from the scene showed riot police trying to enter a block of flats.
An eyewitness at the scene said he saw a number of roads shut.
Police were talking to a man in a block of flats, the eyewitness said.
A spokesman for GMP said they were first called to the scene due to concern for the welfare of a man there.
He said: "Fire crews and police are talking to one of the people in the flats there.
"It's a person in crisis. Some of the neighbouring residents have been asked to move from their flats."
He did not confirm whether any threats were made at the address.
A fire service spokeswoman said crews were sent to the scene at around 5pm.
She said firefighters were called to 'assist' police at the scene.
