Hossein Ali Refaei, head of the province’s medical emergencies center, told reporters on Sunday that the bus crash happened on the road between the cities of Khorramabad and Koohdasht on Saturday night.
He added that at least 22 people were injured in the incident.
According to the official, the injured were transferred to a hospital in Khorramabad, the provincial capital.
Every year millions of Iranians go to Iraq and millions of Iraqis travel to Iran for visits to the two countries’ pilgrimage sites.