Authorities in China say three people were injured when a homemade explosive device was set off at a police station in the country's northeast.

Police in Liaoning province's Shenyang city say the attacker first set fire to the station on Thursday afternoon, then used gunpowder to detonate a homemade explosive in the first-floor reception hall.

Police said in a statement that three people, including two police personnel, suffered light injuries. It said the suspect died at the scene, but did not give further details.

Last month, seven people were killed in northwest Shaanxi province in an arson attack linked to a family dispute.