The police dealing with an incident in the Trowbridge area, blocking all lines. Trains running between Westbury and Bristol Temple Meads will be cancelled or revised.
Disruption is expected until 06:45.
Customer advice
Ammunition has been discovered near the railway in Trowbridge, no trains can run until the police say it is safe to do so.
You may use your ticket, at no extra cost on South Western Railway services between Yeovil Pen Mill and Westbury via Castle Cary and Frome.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.