A building is reduced to rubble after the earthquake struck in Jishishan county, Linxia Hui autonomous prefecture, Gansu province. Photo: Gansu Forest Firefighting

A firefighter talks with two villagers in Jishishan county on Tuesday morning as rescue work continues amid sub-zero temperatures. Photo: VCG

Residents in Jishishan county gather around a fire to warm themselves following the earthquake. Photo: Li Yalong/China News service, VCG

A building in a village in Jishishan county is left in ruins in the aftermath of the quake. Photo: Xinhua

A resident of Jishishan county stands amid the rubble in the wake of the tremor. Photo: Li Yalong/China News Service, VCG

The headlights of a car highlight the extent of the damage to a building in the early hours of Tuesday. Photo: Xinhua

Rescue personnel search the ruins. Photo: Xinhua

Rescue personnel search a village in Haidong city, Qinghai province. Photo: Xinhua