There are delays of 20 minutes on services between between Par and Penzance, and between Truro and Falmouth Docks due to vandalism at Truro. Cancellations can be expected, with disruption expected to be ongoing until around 2pm.
More top news
A coroner has ruled a "series of failures" contributed to the death of a newborn.
Cornish charity ShelterBox has flown volunteers to the Turkey-Syria border to help deal with growing number of refugees there.
In Bristol a flower market is preparing for Valentine's Day. Nearly 90,000 red roses are delivered to the depot before being distributed.