Police in the United Kingdom are investigating the cause of a passenger train collision in central England that occurs after one train’s locomotive driver is killed. Multiple outlets report that two passenger trains collide while traveling toward London, with the incident happening Friday night. On Saturday, officials say nine people are left in critical condition. Accounts describing the moments before the impact include testimony from a passenger, who says the train had stopped and was then struck from behind.

While details about why the trains collide are still under investigation, sources consistently describe the same core facts: the crash involves two passenger trains, the driver of one locomotive dies, and nine passengers or other involved people remain in critical condition. The outlets also align on the broader timeline, with the collision occurring Friday at about 5:15 p.m. local time and updates provided on Saturday. Authorities have not attributed fault publicly, and the investigation is ongoing.