ADDIS ABABA, Ethiopia (AP) — Ethiopians have started observing three days of national mourning after a deadly landslide in which scores were killed.

The death toll is at least 72 following the collapse on Saturday of a mountain of garbage in a landfill outside Ethiopia's capital, Addis Ababa.

Many victims were women and children trapped when makeshift mud-and-stick homes inside the Koshe landfill were buried in debris.

It was not clear how the collapse occurred.