At least 332 people were killed in Iran and Iraq when a magnitude 7.3 earthquake jolted the region yesterday, according to state media in the two countries, and rescuers were searching for dozens trapped under rubble in the mountainous area.
State television said more than 328 people were killed in Iran and at least 2,500 were injured. Local officials said the death toll would rise as search and rescue teams reached remote areas of Iran.
The earthquake was felt in several western provinces of Iran but the hardest hit province was Kermanshah, which announced three days of mourning. More than 236 of the victims were in Sarpol-e Zahab county in Kermanshah province, about 15 km (10 miles) from the Iraq border.
Iranian state television said the quake had caused heavy damage in some villages where houses were made of earthen bricks. Rescuers were labouring to find survivors trapped under collapsed buildings.
The quake also triggered landslides that hindered rescue efforts, officials told state television. At least 14 provinces in Iran had been affected, Iranian media reported.
Iran's Supreme Leader Ayatollah Ali Khamenei offered his condolences on Monday, urging all government agencies to do all they could to help those affected.
The U.S. Geological Survey said the quake measured magnitude 7.3. An Iraqi meteorology official put its magnitude at 6.5 with the epicentre in Penjwin in Sulaimaniyah province in the Kurdistan region, close to the main border crossing with Iran.
Kurdish health officials said at least four people were killed in Iraq and at least 50 injured.
The quake was felt as far south as Baghdad, where many residents rushed from their houses and tall buildings when tremors shook the Iraqi capital.
'I was sitting with my kids having dinner and suddenly the building was just dancing in the air,' said Majida Ameer, who ran out of her building in the capital's Salihiya district with her three children.
'I thought at first that it was a huge bomb. But then I heard everyone around me screaming: "Earthquake!"'
Similar scenes unfolded in Erbil, the capital of the Kurdistan Region, and across other cities in northern Iraq, close to the quake's epicentre.
Electricity was cut off in several Iranian and Iraqi cities, and fears of aftershocks sent thousands of people in both countries out onto the streets and parks in cold weather.
The Iranian seismological centre registered around 118 aftershocks and said more were expected. The head of Iranian Red Crescent said more than 70,000 people were in need of emergency shelter.
Hojjat Gharibian was one of hundreds of homeless Iranian survivors, who was huddled against the cold with his family in Qasr-e Shirin.
'My two children were sleeping when the house started to collapse because of the quake. I took them and ran to the street. We spent hours in the street until aid workers moved us into a school building,' Gharibian told Reuters by telephone.
Iran's police, the elite Revolutionary Guards and its affiliated Basij militia forces were dispatched to the quake-hit areas overnight, state TV reported.
Iranian Interior Minister Abdolreza Rahmani Fazli said some roads were blocked and authorities were worried about casualties in remote villages. An Iranian oil official said pipelines and refineries in the area remained intact.
Iran sits astride major fault lines and is prone to frequent tremors. A magnitude 6.6 quake on Dec. 26, 2003, devastated the historic city of Bam, 1,000 km southeast of Tehran, killing about 31,000 people.
On the Iraqi side, the most extensive damage was in the town of Darbandikhan, 75 km east of the city of Sulaimaniyah in the semi-autonomous Kurdistan Region.
More than 30 people were injured in the town, according to Kurdish Health Minister Rekawt Hama Rasheed.
'The situation there is very critical,' Rasheed told Reuters.
The district's main hospital was severely damaged and had no power, Rasheed said, so the injured were taken to Sulaimaniyah for treatment. Homes and buildings had extensive structural damage, he said.
In Halabja, local officials said a 12-year-old boy died of an electric shock from a falling electric cable.
Iraq's meteorology centre advised people to stay away from buildings and not to use elevators in case of aftershocks.
Additional reporting by Reuters.