** Iranian Plane Crashes in Tehran**
Iranian aviation officials say a passenger plane has crashed, killing at least 40 people.
Authorities say the plane crashed shortly after taking off Sunday, on a road near Tehran's Mehrabab airport.
The aircraft, operated by Sepahan Air, was heading to Tabas, a town in eastern Iran.
Aviation officials say 48 people were aboard the plane.
**44 Dead, 11 Injured in China Bus Accident**
Forty-four people were killed and 11 injured Saturday, when a tour bus collided with two vehicles and plunged off a Tibetan highway and over a cliff.
China's official Xinhua news agency said Sunday that the three-car pile-up occurred Saturday afternoon in mountainous southern Tibet.
Xinhua said the bus was carrying 50 people, mostly tourists from four Chinese provinces. The other vehicles were a sport utility vehicle carrying four people and a pickup truck with only a driver. Their condition is unclear.
The news agency said police have detained managers of the Feixing Travel Agency and the Shengdi Vehicle Tour Company pending an investigation.