Chinese state media say at least 118 people have been killed in the magnitude 6.2 earthquake in the country’s northwest.

A powerful earthquake killed at least 118 people in a cold and mountainous region in northwestern China, provincial officials said on Tuesday, in the nation’s deadliest quake in 10 years.

The magnitude 6.2 quake struck in Gansu’s Jishishan county, about 5km (3 miles) from the provincial boundary with Qinghai. The epicentre was about 1,300km (800 miles) southwest of Beijing, the Chinese capital.

There were nine aftershocks by 10am local time, about 10 hours after the initial quake, the strongest one registering a magnitude of 4.1, a Gansu official said.

Nearly 4,000 firefighters, soldiers and police officers were deployed or on standby as part of the rescue effort.

Emergency authorities in Gansu province also issued an appeal for 300 additional workers to comb through collapsed buildings and for other search and rescue operations.

In Qinghai, officials reported 20 people missing in a landslide, according to Chinese state-owned media.

The earthquake left more than 500 people injured, severely damaged houses and roads, and knocked out power and communication lines, reports said.

It struck just before midnight on Monday near the boundary between the two provinces at a relatively shallow depth of 10km (6 miles), the China Earthquake Networks Center said.

China said the quake had a magnitude of 6.2, while the United States Geological Survey reported the magnitude was 5.9, and the European Mediterranean Seismological Centre said it was a magnitude 6.1 earthquake.

The death toll is the highest since an April 2013 earthquake killed 196 people in southwest China’s Sichuan province.

A 7.9 magnitude earthquake in 2008 was the country’s deadliest in recent years, which killed nearly 90,000 people in Sichuan.

An aerial photo shows the mudslide-struck Caotan Village
An aerial photo shows the mudslide-struck Caotan village in Minhe Hui and Huzhu Tu Autonomous County of Haidong city, Qinghai province. [Zhang Hongxiang/Xinhua/EPA]

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Rescuers at the scene in Caotan Village
Nearly 4,000 firefighters, soldiers and police officers were dispatched in the rescue effort. [Zhang Hongxiang/Xinhua/EPA]
A view of rubble and damaged buildings at Dahejia town
Damaged buildings in Dahejia town, Gansu province. [Cnsphoto via Reuters]
Residents keep warm by a fire
Residents keep warm by a fire next to damaged buildings at Dahejia town. [CNS Photo via Reuters]
Rescue workers carry an injured person
Rescue workers carry an injured person on a stretcher in Dahejia town. [CNS Photo via Reuters]
A person injured in an earthquake receives treatment
A person injured in the earthquake receives treatment at a hospital in Minhe Hui and Huzhu Tu Autonomous County of Haidong. [Zhang Hongxiang/Xinhua/EPA]
A woman hugs her baby inside her coat to keep warm as they huddle together following the earthquake
People gather outdoors the morning after an earthquake in Dahejia. [AFP]
A resident looks at a collapsed building
A resident looks at a collapsed building after the earthquake in Jishishan county, Gansu province. [CNS Photo via AFP]