Several streets were taped off as police probe reports gunmen opened fire in two different streets at the same time.
Police and forensics have set up three crime scenes after the reported simultaneous shootings at 12.30am today.
Witnesses said they could hear gunshots being fired on Vicarage Road, in Abram, Wigan in the early hours of Thursday morning.
The upstairs and downstairs windows of a property on the street appear to be visibly damaged.
Forensics officers can be seen outside the house combing the area for clues - reports the Manchester Evening News.
Around the same time gunshots were also heard on Redland Court, a mile and a half away.
On this occasion residents said they also heard a flurry of gunshots at about 12.30am and a woman was seen being taken to hospital in an ambulance.
The North West Ambulance Service said a patient at a private address was taken to hospital this morning.
A resident in Vicarage Road in Abram told reporters they heard shouting following by gunshots at about 12.30am this morning.
There is visible damage to the upstairs and downstairs windows of one of the houses on the street and forensics officers are outside the properties.
A scene is also in place about a mile and a half away in Redland Court, where residents say they also heard a flurry of gunshots at about 12.30am. Police are yet to confirm whether the two incidents are linked.
A resident on the street said they heard "seven or eight loud bangs" and a wheel spin. They said that armed police and an ambulance turned up shortly after and a woman was seen being taken into the ambulance
A third scene is also in place on a dirt track leading off Bolton Road, about 150 metres from Redland Court, where a forensics team is investigating a burned out car
A tactical aid unit is at the scene. Forensics officers are also working on the street.
A tweet from GMP Hindley said: "WARNING:Due to on-going Police Incident in Abram, please avoid area as traffic is starting to build up Simpkin St/Vicarage Rd, Abram. #teamabram"
