A gas explosion at a coal mine in northern China has killed at least 90 people, state media report, the country's biggest mining disaster in 17 years.

Rescuers are still searching “intensively” for nine people who remain unaccounted for.

A gas explosion at a coal mine in northern China has killed at least 90 people, state media reported on Saturday, the country's biggest mining disaster in 17 years. A total of 247 workers were underground at the time of the blast, which occurred at 7:29 p.m. on Friday at…