An Afghan government spokesman says two separate highway crashes in the southeast have killed 50 people and injured 76. Spokesman Hafiz Omar said Thursday one was a collision between a passenger bus and an oil tanker on the Kabul-Kandahar highway in Ghazni province on Wednesday night. The other occurred in a different area of the same province. Omar said the injured are in hospital, while authorities are in the process of handing over the bodies to the victims' families. Traffic accidents are common in Afghanistan, mainly due to poor road conditions and driver carelessness.