GUIYANG - Two people were killed and 21 others injured in a truck-bus collision accident on Saturday afternoon in southwest China's Guizhou province, said local traffic police.

The accident happened at about 2 pm, when a double decker sleeper coach collided with a truck on an expressway nearby Liupanshui city in Guizhou. Both drivers of the coach and the truck dead at the scene.

The injured have been sent to hospital.

The cause of the accident is still under investigation.