In one of the worst fire tragedies in Delhi, at least 43 people were killed and several others were injured when a blaze swept through a factory in a five-storey building in the capital’s Rani Jhansi Road early Sunday morning, police said. Rescue operations are underway.As casualties mounted quickly, a team of National Disaster Response Force (NDRF) also arrived at the site of the fire to help in rescue operations.Hours after the tragedy, the Delhi government ordered a probe into he fire and sought a detailed report within seven days.“It is a very sad incident. I have ordered a magisterial inquiry into it. Compensation Rs 10 lakhs each to be given to families of those dead and Rs 1 lakh each to those injured. The expense of medical treatment of those injured to be borne by the government,” Delhi chief minister Arvind Kejriwal said after visiting the site of the accident.There were sewing machines and raw materials for manufacturing jackets, fire officials said. Bags, clothes, cardboards and plastic items were also being made in the building.Delhi Fire Service (DFS) director Atul Garg said the fire started around 5 am in a five storey building where around 60 people were sleeping, most of them contractual labourers and factory workers. All victims were men.“The fire was big and we pressed in more than 50 fire tenders… Most died of smoke. Sixty-three people were removed from inside the building, dead or alive,” Garg said.The fire services director also said that they are yet to ascertain the reason behind fire. “Whether the building had firefighting equipment is a matter of probe,” he said. “It was a very old building, not approved in any way.”Of the two staircases in the building one was blocked by goods. The building also had lot of combustible materials inside. It had no ventilation.