Twenty-two people have been killed and about 20 injured in Iran when a bus crashed head-on into a truck on a highway between Birjand and Nahbandan.
The accident occurred in the early hours of Monday in the province of South Khorasan.
Police said the truck had drifted into the lane of the oncoming bus.
Iran has one of the worst traffic safety records in the world, with many thousands killed each year on the country's roads.
The accidents are blamed on poor police supervision, reckless driving and badly maintained roads and vehicles.