Doormen at a Wigan club were sprayed in the eyes with a noxious substance by a gang armed with baseball bats in a terrifying early-hours incident.
The three offenders struck outside Indiependence on King Street West at around 3am on Saturday.
The gang sprayed an unknown substance into the faces of those keeping revellers safe at the entrance to the popular nightspot before attacking them.
The doormen managed to defuse the situation but it is believed one went to Wigan Infirmary for treatment to his eyes on Sunday and was told to ensure all his colleagues also visited the hospital.
Former security chief Mick Lyons says he believes the doormen were sprayed with ammonia and has condemned the attack, saying more needed to be done to get to grips with a rising tide of violence gripping Wigan town centre.
Mr Lyons said: “If there’s a gang roaming around that should be top priority. Innocent people in Wigan for a night out could have bumped into them.
“The town centre is going to rack and ruin. Security is not strong enough and nobody is working together, there seems to have been a breakdown in communication between all the parties. It’s sad.
“We’ve not had incidents like this in Wigan in all these years, but now it has happened and if nobody mentions it then it’s going to happen again.”
Greater Manchester Police confirmed there was an altercation outside the club after the liquid had been sprayed into the doormen’s eyes.
The offenders managed to get away from the scene and no arrests have been made so far. Police searched the area for CCTV footage but have been unable to locate any.
Indiependence is a popular club with Wigan revellers hosting indie and rock nights and also putting on dance music events as Attic.
Anyone with information about the attack should call police on 101 or ring independent charity Crimestoppers, anonymously, on 0800 555 111.