Whitland train crash: Passenger films reaction on mobile
A train with about 60 people on-board has been in collision with a hay lorry on a level crossing in Carmarthenshire.
Seven people on the Milford Haven to Manchester service suffered minor injuries in the incident near Whitland at 09:50 GMT on Monday.
British Transport Police (BTP) said a 48-year-old local man was being held on suspicion of endangering safety.
Ben Overton from Haverfordwest was on-board the train and recorded the aftermath on his mobile phone.