A passenger has jumped overboard say Wightlink – coastguard teams are now searching for the customer on Wednesday (August 29).
Both RNLI boats from Portsmouth and the Lee-on-Solent Coastguard helicopter is assisting the search for the passenger, as are harbour patrol vessels and a Royal Navy vessel.
A Wightlink customer is said to have jumped from the 10.30am sailing of the St Cecilia car ferry in Portsmouth Harbour.
The Fishbourne – Portsmouth ferry route is experiencing delays.
Update 12.02pm: A spokesman for Wightlink said: “On the 10.30am St Cecilia car ferry from Portsmouth to Fishbourne a passenger was seen to jump overboard, just outside Portsmouth Harbour.
“The crew of St Cecilia deployed the ship’s rescue boat and the Coastguard is now the lead authority on this matter, with a number of vessels assisting in the search.
“St Cecilia is still in the area of the incident while authorities are trying to recover the person, with customers on board.”
A spokesman for HM Coastguard said: “The Mayday call came in around 10.50am on Wednesday (August 29) and an extensive search is being carried out of the area.
“Two RNLI lifeboats from Portsmouth, the HM Coastguard search and rescue helicopter from Lee-on-Solent, Hillhead and Portsmouth Coastguard Rescue Teams are all involved.
“Also assisting are harbour patrol vessels and a Royal Navy vessel.
“HM Coastguard has also broadcast a relay to vessels in the area requesting they respond, and assist with the search.
“We have no further information at this time.”
Updates to follow.