Four members of a family were killed and five others sustained injuries when a two-storied over-lived and expired building collapsed in Rajanpur on early Sunday, a private TV reported According to police, the collapse took place due to fragility of the building meanwhile, rescue teams, promptly responding to calamity, arrived on the scene and managed to rescue five persons from the rubble. However, they could not have taken out four members of a family, which included a couple and its two kids, whom rescuers found dead, police confirmed to media. Injured persons were soon shifted to DHH, sources said.