JINAN - Four people were dead and 13 others injured Tuesday evening after two farm vehicles collided in East China's Shandong province, local government said Wednesday.

The accident occurred at around 7 pm at the Zhanhua section of Bingu highway in Zhanhua county, said a statement released by the county.

One was killed at the scene and three others died in hospital as of 8 am Wednesday despite medical treatment.

The statement did not say whether the casualties were aboard the vehicles or pedestrians.

The cause of the accident is under investigation.