Shortly before 6.30am, British Transport Police were called to reports of a car having been struck by a train at Athelney automatic half barrier level crossing.
The train involved is the 0546 Exeter to London Paddington service.
The train has not been derailed and there are no reports of any injuries to anyone on board.
The car is trapped under the front of the train and services are currently stopped in the area.
More top news
The Royal Bath and West is celebrating 50 years at the showground near Shepton Mallet. Here's a taster, including Downton's Julian Fellowes
Bristol were 6 points ahead on aggregate until a last minute converted try sent Worcester back to the top flight at the first attempt.
Britain's oldest groundsman is offering his life savings to save a local football club which will fold on Sunday unless a solution is found