Detectives investigating a series of shootings have been given an extra 36 hours to question four people.
Armed police arrested a 26-year-old man in Derbyshire on Saturday on suspicion of robbery, aggravated burglary and attempted murder.
The arrest follows a number of incidents in Wigan in which shots were fired at police officers and a man, aged 60, suffered chest wounds.
Two women and a man are also being held on suspicion of helping an offender.
Car theft
The first incident took place on 2 November when police officers were shot at while investigating a burglary.
On 8 November shots were fired in the Beech Hill area of the town.
A 43-year-old woman had her car stolen at gunpoint on Friday and 35 minutes later a man was taken to hospital after an incident in the Wigan Lane area. He is in a stable condition.
Later that evening two men were threatened with a gun by a man who stole their car.