At least seven people were killed and 11 injured when a truck collided with a passenger bus in Turkey's eastern province of Agra.

"Seven of our citizens died after the bus collided with a truck and caught fire," Turkish President Tayyip Erdogan said.

Thick black smoke was billowing from the scene, and local media reported that passengers suffered severe burns. "A large number of crews have been dispatched to the scene and rescue efforts are continuing," the Interior Ministry said in a statement.