At least two firefighters were injured while battling the blaze from a laboratory at the Security Forces Hospital in Makkah Friday, authorities said. The fire started in the nurses' lounge which had electrical appliances which are believed to have caused a short circuit, according to initial investigation reports. “It was just an accident,” said Col. Ali Al-Muntashiri, spokesman of the Makkah Civil Defense. One injured firefighter was taken to Noor Specialist Hospital and the other one was treated on the spot, he said.