Police, fire and ambulance were called to the ferry port shortly after 7.40 am and were in place ahead of the arrival of the P&O European Causeway Ferry which had left from Larne.
Shortly after the incident a statement given by Police Scotland said: “The ferry is now docked safely at Stranraer.
“During a choppy sailing, there has been a movement of vehicles on the car deck and this has caused around six vehicles to tip over onto their side.
“Due to the movement on the deck, there are a number of passengers confined to vehicles.
“We are able to confirm all 52 passengers and 56 crew on board are safe and well and no-one has any injuries.
“The incident remains ongoing and our emergency services will remain at the ferry terminal to provide any necessary support for the time being.”
Commenting, South Scotland MSP Colin Smyth said: “It is a huge relief that no one was injured despite the scale of this incident. “All emergency services deserve praise for the speed of their response and once again they have worked so effectively together in Dumfries and Galloway.”
