A four-storey building under construction in Rwanda has collapsed, killing at least six workers and injuring dozens more people, police said.
Authorities are searching for survivors after the building collapsed in the eastern district of Nyagatare, in what police called an "unfolding tragedy".
At least 30 workers injured in the collapse are being treated at a nearby hospital, said Christophe Semuhungu, the police spokesman for Rwanda's Eastern Province.
It is not yet clear what caused the collapse or how many people are feared to be still buried under the rubble.
In recent years, building collapses have become frequent in East and Central African countries as some property developers bypass regulations to cut costs.
In March, a building collapsed in the Tanzanian city of Dar es Salaam, killing at least 30 people.