Two people were killed and at least six injured in the blasts, in the city of Fuzhou.

Unconfirmed reports say car bombs were detonated outside the offices of the state prosecutor and at the city's food and drug agency; a third blast hit a district administration office.

Officials say the cause of the blasts is being investigated.

However, the Xinhua news agency said a farmer unhappy about the handling of a legal dispute was thought to be responsible.

One body was found in the district government building and another person died later in hospital, a local government official said.

The near-simultaneous blasts went off shortly after 0900 (0100 GMT), reports say.

One eyewitness told Xinhua news agency that most of the windows had been blown out at the eight-storey local prosecutor's office.

Other eyewitnesses said ambulances had arrived at the scene to take several injured people from the local government office to hospital.

At least 10 cars were destroyed in the explosions, reports say.

Earlier this month, more than 40 people were injured in a petrol bomb attack on a bank, by a disgruntled former employee, in north-west Gansu province.