A couple was killed while their baby girl injured under collapsed roof, caused by gas heater blast here in Hyerabad on Wednesday. According to Police, to prevent severe coldness, the residents of a house in Fakir Kapar Colony here burnt gas heater before sleeping. The gas heater blasted and the roof of house collapsed on the family. As a result, the couple died while their baby girl sustained serious injuries. After the incident, the police, Edhi volunteers and neighbors rushed to the collapsed house and recovered bodies of the expired couple and critically injured four-year old baby girl. The deceased couple identified as, Muhammad Hussain, 32, and his wife Zohra. The bodies and injured were shifted to hospital while police started investigation.