Lucknow, July 7 (IANS) At least 31 people were killed and over 30 injured when an express train collided with a bus at an unmanned crossing in Uttar Pradesh's Kanshiram Nagar district early Thursday, officials said.

 
 The accident took place around 2 a.m. at an unmanned railway crossing in Thanagaon, about 250 km from here, when the Chhapra Mathura express train rammed into the bus carrying members of a wedding party, Government Railway Police inspector Dalveer Singh told IANS.
 
 "Till now 31 people have died in the accident that took place at around 2 a.m. I have ordered a separate probe at my level into the accident. As of now we cannot tell what exactly led to the incident or who was at fault," added Kanshiram Nagar District Magistrate Selva Kumari J.
 
 "Most of the passengers in the bus were natives of Etah district. In order to gather more information about the victims, we are in contact with officials in Etah. All the injured are being treated in hospitals and community health centres of Kanshiram Nagar and Etah districts. A team of railway doctors is also assisting the local medical staff in treating the injured," Selva Kumari told IANS.
 
 The state government has announced compensation of Rs.1 lakh to the family of those killed and Rs.50,000 to those grievously injured. Those with minor injuries would be given Rs.25,000, officials said.
 
 The rail tracks that were affected following the accident have been repaired. "The route has now been cleared. We have been told that the engine of the train hit the rear portion of the bus," said an official.
 
 There were around 80 passengers in the bus at the time of the accident.