ARSONISTS attacked a youth centre in Rastrick.
Rags were stuffed through the door at Rastrick Youth Forum early yesterday morning.
A cleaner who arrived at the prefabricated building at Burnsall Road at 11am discovered it was smoke-logged.
The fire had started in the lobby, but the fire doors held it back and it burned itself out.
Residents told firefighters they heard an alarm go off at the building at 7.30am which could be when it was attacked.
The lobby was wrecked by heat and smoke.