One person was killed, four were injured and another two are missing in a chemical plant fire in northwest China's Gansu Province on Sunday, provincial authorities said.

A facility leaked and caught fire at the Qingyang Petrochemical Company owned by PetroChina at around 7 a.m. on Sunday, said the government of Qingyang City.

As of 11:55 a.m., the fire was extinguished without causing secondary accidents, it said.

Rescue and further investigation are under way.