New Delhi, July 19 (IANS): Rescue work is being carried out in the Saturday night's five-storey building collapse in west Delhi in which five people have died and 13 seriously injured, a police official said on Sunday.

"Five people have died in the Saturday night building collapse and 13 are seriously injured. Rescue work is being carried out jointly by the fire department, police and the residents," a police official told IANS.

Police suspect the building, located in a narrow lane in Vishnu Garden area, was illegally built.

Eight fire tenders, teams of the National Disaster Response Force (NDRF), police and officials from district administration started the rescue operation after the Delhi Fire Service received the call at 9.10 p.m.

A.K. Sharma, chief of Delhi Fire Services, told IANS the rescuers were looking for one more person in the debris.

"We are not winding up our rescue operation right now, as people believe there might be one more casualty....so we are looking for that," said Sharma.

He said the rescue teams were facing a few challenges as the building is located in very congested and narrow lanes.