An explosion at an industrial park in China’s Sichuan province has left 19 people dead and 12 others injured.

According to state news agency Xinhua, the authorities in Jiang’an county said the blast happened at a chemical plant run by Yibin Hengda technology.Photos on Chinese social media showed a huge fire and plumes of smoke rising from the facility.

It is not clear what caused the explosion.According to Xinhua the fire, which broke out last evening, had been put out early today. Those injured in the blast were in a stable condition.