CAIRO (AP) – A building collapse in the Egyptian capital of Cairo killed six people, authorities said, as rescuers at the scene searched through the rubble. It was not immediately known what caused the collapse. The city’s deputy governor, Ibrahim Abdel-Hadi, said in a statement released by the Interior Ministry that one family of six was believed to have been inside the six-story building in the El-Waily neighborhood when it gave way in the early hours of the morning.

People were also asked to leave the surrounding buildings because of structural concerns. The country’s government has tried to crack down on illegal building in recent years after decades of lax enforcement.