A 7.3-magnitude earthquake has rattled the northern border region between Iran and Iraq, killing at least 170 people and injuring more than 1,000.
At least 164 people died in western Iran's Kermanshah province, officials told state media.
Six more were reported dead in Iraq. The death toll is likely to rise.
The earthquake sparked panic, with fears of aftershocks sending residents out into the streets.
Mosques in the Iraqi capital Baghdad have been broadcasting prayers through loudspeakers.
Most of the victims were in the town of Sarpol-e Zahab, about 15km (10 miles) from the border, Iran's emergency services chief, Pir Hossein Koolivand was quoted as saying on Iranian state television channel IRINN.
The town's main hospital was severely damaged, leaving it struggling to treat hundreds of wounded, state TV reported.