Amid the increasing tension of US and Iran over Nuclear Deal, US has sent missile defense system and ships to the Gulf region.
The Washington sends Patriot missile-defence system to the Middle East amid escalating tensions with Iran.
A warship, USS Arlington, with amphibious vehicles and aircraft on board, will also join the USS Abraham Lincoln strike group in the Gulf.
The Pentagon has said that US B-52 bombers have arrived at a base in Qatar.
The US said the moves were a response to a possible threat to US forces in the region by Iran, without specifying. Iran dismissed the claim as nonsense.
Tehran has described the deployments as “psychological warfare” aimed at intimidating the country.
Iran has also suggested it may resume uranium enrichment nuclear activities.
The Pentagon says US forces are responding to a possible threat to US forces, but did not offer any specifics regarding those threats.
The latest Pentagon statement on Friday said only that Washington was “ready to defend US forces and interests in the region”, adding that the US did not seek conflict with Iran.
There are about 5,200 US troops currently deployed in neighbouring Iraq.
The Patriot system can counter ballistic missiles, cruise missiles and advanced aircraft.