Forensic police officers are currently attending a house on a Wigan street.
Neighbours have reported a heavy police presence at a home on Gordon Street in Ince.
One eye witness said: "Last night, around midnight, police in street shining torches everywhere. This morning at one of the houses, two police cars still there and now forensics are there too."
Greater Manchester Police have confirmed an ongoing incident at one of the properties on the street, which is believed to be "serious".
More to follow.