An explosion that killed the daughter of a law enforcement official is being investigated by police in North China's Shanxi province, local authorities said on Thursday.

The explosion, at 3:30 pm on Monday, rocked a building in a residential compound in Xiangfen county that mainly houses taxation officials, killing a 20-year-old woman, the county government said in a statement on its website.

The woman was the daughter of a deputy head of the county's law enforcement body, the statement added.

The local public security bureau has confirmed the incident is a criminal case and is investigating, it said.