Rescue work is underway after the collapse of a coal mine in Alshaa League, Inner Mongolia autonomous region on Feb 22, 2023. (PHOTO / XINHUA)

HOHHOT - Search and rescue efforts at a collapsed coal mine in Alshaa League, north China's Inner Mongolia autonomous region, resumed on Thursday afternoon, after being halted by a massive landslide at the rescue site at around 6 pm on Wednesday.

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An open-pit coal mine collapsed in Alxa Left Banner at around 1 pm on Wednesday, leaving more than 50 workers trapped inside. 

This aerial photo taken on Feb 23, 2023 shows rescue vehicles near the site of a collapsed coal mine in Alxa League, north China's Inner Mongolia autonomous region. (PHOTO / XINHUA)

Rescuers have so far brought out 10 people from debris, including four dead and six injured who were immediately sent to hospital, according to the rescue headquarters. Forty-nine others were still missing.

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As of 6 am Thursday, more than 900 people had rushed to the site for rescue operations.

Li Zhongzeng, head of Alshaa League, said their operation was facilitated by more than 130 sets of large machinery. 

Rescue workers gather at the site of a collapsed coal mine in Alxa League, north China's Inner Mongolia autonomous region, Feb 23, 2023. (PHOTO / XINHUA)

Wang Xiangxi, minister of emergency management, and Sun Shaocheng, Party chief of Inner Mongolia, had both arrived at the coal mine to guide the rescue operation.

With Xinhua's inputs