A three-storey building in Lahore’s Harbanspura collapses late on Wednesday night, killing at least 11 people and injuring six, according to authorities. The Lahore deputy commissioner’s spokesperson, Harris Ali, says the death toll rises to 11 after rescuers recover a girl’s body, and that at least one other minor is believed to still be trapped in some reports. The structure collapses from the top down, the authorities add. Rescue 1122 teams, with district administration officials, clear debris at the site, and heavy machinery is deployed to speed up recovery.

Officials say three brothers and their families live in the building and were joined by their sister and her children for a birthday celebration on the night of the collapse. The cause of the collapse is not determined, and Lahore deputy commissioner retired Capt Muhammad Ali Ijaz orders an inquiry. One outlet reports authorities suspect heavy monsoon rains may have weakened the structure.

The incident follows other recent Lahore and Punjab collapse cases, including a roof collapse at a tuition centre in Kahna that killed 14 children and a classroom roof collapse in Dera Ghazi Khan that killed four children.