It is believed that the Libertian registered Nave Andromeda tanker was due to dock in Southampton earlier today.
Police are currently investigating an “ongoing incident” aboard an oil tanker off the Isle of Wight.
Emergency calls have been made in concern that stowaways may have tried to hijack the vessel.
This is stated in a statement from Hampshire Police: “We are aware of an ongoing incident on board a vessel south of the Isle of Wight and we are dealing with such an incident”.
Isle of Wight Radio reported this afternoon that the Coast Guard helicopter circled the crude oil tanker.
However, it is now surrounded by a restricted area after it was reported that it was the victim of a hijacking attempt by stowaways.
The Liberian-registered vessel weighs more than 42,000 tons and there is a restricted zone of five nautical miles around the vessel.
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said the British Coast Guard: “We are currently assisting the Hampshire Constabulary in the event of an incident on board a ship off the Isle of Wight.
The Mirror reports that there are unconfirmed reports that the ship was taken over by stowaways who were hiding on board.
“The search and rescue helicopters from Lee on Solent and Lydd are present”.
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A spokeswoman for the Associated British Ports (ABP), which operates the port of Southampton, said they had had no contact with the vessel and had no further comment.
The incident is likely to result in the involvement of the armed forces, including the Royal Navy and the Special Boat Service (SBS).
It was built in 2011, is 228 meters long and has a total capacity of 42,338 tons.
It was last known that the tanker moored in Lagos, Nigeria on October 5.
The Special Boat Service is located just a few miles away in Poole, Dorset.
It is believed to be owned by the Greek company Navios Tankers Management Inc.