Nine people were killed and 10 others injured in a coal mine accident caused by a tremor in northeast China’s Jilin province.

The workers were trapped in a shaft after the tremor jolted the coal mine under the management of Jilin Longjiabao Mining Co in Jiutai city in Changchun New Area Sunday night, state-run China Daily reported Monday.

The injured were being treated at a local hospital.

An investigation is underway, the report said.