In a bus accident in the southern Fars province of Iran on Tuesday evening, 20 people were killed and 20 others were injured, semi-official Mehr news agency reported.

The passenger bus was carrying 40 pilgrims from Iran's central city of Yazd to the Iraqi city of Karbala, when it faced the accident in Eqlid region of Fars province.

The emergency aids have been dispatched to the sight of accident and the cause is under investigation, the report said.