DUBAI: More than 3,000 United States military personnel have arrived in the Red Sea aboard two warships, part of a beefed up response from Washington after tanker seizures by Iran, the US Navy said Monday.

The deployment adds to a growing US military buildup in tense Gulf waterways vital to the global oil trade and led Tehran on Monday to accuse the US of inflaming regional instability.

The US military says Iran has either seized or attempted to take control of nearly 20 internationally flagged ships in the region over the past two years.

The US sailors and Marines entered the Red Sea on Sunday after transiting through the Suez Canal in a pre-announced deployment, the US Navy’s Fifth Fleet said in a statement.

They arrived on board the USS Bataan and USS Carter Hall warships, providing “greater flexibility and maritime capability” to the Fifth Fleet, the statement from the Bahrain-based command added.

The deployment adds to efforts “to deter destabilising activity and de-escalate regional tensions caused by Iran’s harassment and seizures of merchant vessels,” Fifth Fleet spokesman Commander Tim Hawkins told AFP.

USS Bataan is an amphibious assault ship which can carry fixed-wing and rotary aircraft as well as landing craft. The USS Carter Hall, a dock landing ship, transports Marines, their gear, and lands them ashore. In a Monday press conference, Iran’s foreign ministry spokesman Nasser Kanani said US deployments are only serving Washington’s interests.