At least four killed as express train derails in India's Bihar state

At least four people were killed and several others injured when an express train derailed in the Indian state of Bihar, local media and officials reported.

The train from Anand Vihar Terminal railway station in Delhi came off the rails at around 21:35 local time (16:05 GMT) on Wednesday as it raced to the Kamakhya Junction in Assam, the Times of India newspaper reported.

"Four casualties have been confirmed and rescue operation is under way. Twenty-one coaches have derailed," Tarun Prakash, general manager of the East Central Railway, was quoted by the Times as saying. The ANI news agency also put the death toll at four.

The cause of the derailment was not immediately known.

India's Minister of Railways Ashwini Vaishnaw said on social media that rescue operations at the site of the derailment were now complete.

In June, India experienced its worst train crash in two decades in Odisha, which resulted in the death of at least 288 people.