SMOKE billows from Sheffield Ski Village in a fourth blaze in four months.
A large area of ski slope matting went up in flames in an arson attack early yesterday.
Firefighters from Central station spent two hours at the complex on Vale Road, Parkwood Springs, after several people saw clouds of smoke and raised the alarm.
A fire service spokesman said the fire was being treated as deliberate.
The incident is another blow for the blaze-hit Ski Village.
On April 29, a huge fire destroyed the chalet-style clubhouse, reception area, bowling alley, ski hire and function rooms.
The blaze caused millions of pounds of damage but investigations showed it was not started deliberately.
Two subsequent blazes at the facility are being treated as arson.
A second fire was started two days later in the ski lift control tower at the top of the slopes.
And firefighters were called to the centre a third time on May 21, when grass near the slopes was set alight.
A fire service spokesman said yesterday’s blaze was close to the adventure playground.
He added: “A hose reel and a high pressure water jet were used to tackle the fire.
“We took the call at 6.10am and were on the scene until 8am.
“Investigations at this stage show the matting was set on fire deliberately, the police have been informed.”
n Anyone with information should contact South Yorkshire police on 101.