India, June 20 -- British Transport Police said on Friday that it was responding to reports of a train "collision" north of the capital city of London amid media reports of injuries, with other emergency services also attending the scene.

Unverified footage posted to social media appeared to show two East Midlands Railway (EMR) trains having collided, with one running into the other, and passengers pictured standing on the tracks beside damaged rail carriages, AFP reported.

"A major incident has been declared, and officers are continuing to respond at the scene alongside colleagues from Bedfordshire Police and the local Fire and Rescue and Ambulance Services," the police force said in an update late on Friday.

"We know that a number of...