PATNA, India (AP) — Officials say a passenger train has derailed in eastern India, killing at least four people and injuring eight others.

District administrator Kundan Kumar says the engine and 11 coaches of the train derailed early Wednesday near Chhapra station in Bihar state.

The cause of the accident was not immediately known.

The train was traveling from the capital, New Delhi, to Dibrugarh in the remote northeastern state of Assam.

Railway accidents are common in India, which has one of the world’s largest train networks and serves 23 million passengers a day. Most of the accidents are blamed on poor maintenance and human error.