Police in Shanxi province are holding a suspect they say was involved in an explosion that killed the daughter of a law enforcement official on Feb 18, authorities said on Friday.

Police from a special investigation team caught the suspect, named Yang, in Huangya village in Xiangfen county, Shanxi province, on Thursday, China News Service reported.

On Feb 18, the explosion rocked a building in a residential compound in Xiangfen county that mainly houses taxation officials. Killed in the blast was a 20-year-old woman named Li, the daughter of a deputy head of the county's law enforcement body.

Yang confessed that he put the explosive device outside the door of the victim's home on Feb 16, and it blew up when the family returned from outside the city two days later, police said.

The investigation is continuing, the report said.