Urumqi (China), Aug 9 (Xinhua) An Afghan plane scheduled for Urumqi in northwest China's Xinjiang region was threatened by a bomb Sunday, police sources in Xinjiang said.

The sources had previously said the plane was hijacked.

The Urumqi airport has received orders from aviation authorities to not allow the plane to land in the city.

Armed police and emergency vehicles have rushed to the airport for emergency response.