The Port of Calais has been closed after around 50 migrants reportedly made their way onto a ferry causing a “security incident”.
A statement from the Port of Dover said the French port was experiencing “migrant activity” which had caused disruption to services.
It read: “The Port of Calais is currently experiencing migrant activity which has caused disruption to ferry services. Therefore services to and from Calais via the Port of Dover are affected, but DFDS Seaways services are still running to Dunkirk as normal.
“The Port of Dover remains open for business, but the duration of this disruption to services remains unknown.”
P&O Ferries Updates tweeted: “Port of Calais is still resolving the security incident. But vessels now being allowed to dock, loading should commence soon.”
Port of Calais is still resolving the security incident. But vessels now being allowed to dock, loading should commence soon.1/2— P&O Ferries Updates (@POferriesupdate) January 23, 2016
The incident comes after Britain's Labour leader Jeremy Corbyn visited the Grande-Synthe Camp, near Dunkirk, and The Jungle in Calais, where more than 7,000 people are sleeping rough amid the mud, wet and cold.
Earlier in the day a protest organised in support of the migrants living in squalid conditions attracted around 2,000 people.