CHENNAI, DECEMBER 13: Six nuns of a convent were killed and one was injured when the building in which they were sleeping collapsed early on Monday at Seyyur in Tamil Nadu's Kancheepuram district.Police said here that five bodies had been extricated. Police and fire service personnel were engaged in removing the sixth.The building, located in the precincts of a Christian missionary school, was said to be very old.The injured had been hospitalised, police added.