ROYAL Navy frigate HMS Monmouth has seized cannabis and heroin with a street value of £65m from a suspect vessel in the Indian Ocean.

Sailors and Royal Marines from the Type 23 frigate destroyed 455kg of cannabis and 266kg of heroin after finding it hidden in the freezer of a fishing boat.

The suspicious dhow - a type of vessel common to the Middle East and Indian Ocean - had been spotted by the ship in an area not normally known for fishing.

Swooping into action before the smugglers could destroy any evidence, HMS Monmouth sent two boarding teams in fast rigid inflatable boats to intercept the dhow.

The teams spent 60 hours scouring the vessel for narcotics, before eventually finding them hidden in a freezer beneath three tonnes of ice.

Commander Ian Feasey, HMS Monmouth’s Commanding Officer, said: “Such a substantial seizure of drugs will deal a significant blow to the international narcotics trade which is known to provide funding for terrorist organisations.

"I am extremely proud of the professionalism, diligence and perseverance of my boarding team to achieve a result in such arduous conditions. This has been an effort by the whole ship’s company and their efforts speak volumes about the Royal Navy’s ability and commitment to preventing illegal activity on the high seas.”

Lieutenant Alison Ross, one of HMS Monmouth’s boarding officers, said: “After such a long search I had doubts we would find anything, but the reactions of the crew to our activity in certain areas was enough to convince us that there was illegal cargo.

“Eventually the breakthrough was made and we could bring the operation to a close, having successfully put a stop to the progress of the drugs.”

Once all the drugs had been photographed by the Royal Navy Police on board HMS Monmouth, the packages were disposed of in the sea ensuring no profits can be made from them.

HMS Monmouth will now continue her patrols of the Indian Ocean as part of Combined Task Force 150 (CTF150), a coalition of warships with a mission to ’promote maritime security in order to counter terrorist acts and related illegal activities, which terrorists use to fund or conceal their movements.’

CTF150, which is currently being led by the French Navy, has now scored three major drugs busts in this month alone. Earlier in May, Australian frigate HMAS Arunta pounced on a dhow and recovered 250kg of heroin.

That drug bust came hot on the heels of a double seizure of heroin by the French frigate Surcouf which brought in 400kg of heroin, worth around £120m on the streets.