At least eight people have died and dozens remain trapped underground after a gas explosion at a coal mine in northern China, state media reported on Saturday.

The blast took place at 7:29 pm (1129 GMT/UTC) on Friday at the Liushenyu coal mine in Qinyuan county in Shanxi, one of China's poorer provinces, with 247 ⁠workers ​on duty ​underground, according to state news agency Xinhua.

Xinhua reported that 201 people ‌had been brought safely to ​the surface by early Saturday, ⁠including the eight confirmed dead. Rescue efforts are ongoing.

What else do we know about the Chinese coal mine accident?

Earlier, Xinhua said that levels of carbon monoxide had "exceeded limits" at the mine. Some of those trapped underground were in "critical condition."