Residents 2-storeyed building in Kharadi area jumped out of their beds in the wee hours yesterday, after a blast resonated through the elevator shaft and shattered window panes and set of car alarms.

The blast happened at C2-wing of Colonnade Complex building, which comprises 47 flats. The police team investigating the case suspect the explosion was the result of methane gas emanating from the garbage duct and igniting due to electrical sparking in the lift shaft. Though no injuries have been reported, three doors leading to the elevator on different floors were damaged. The police are currently awaiting the forensic report to establish the cause behind the blast.