The US Central Command released photos of B-52 bombers assigned to 20th Expeditionary Bomb Squadron that arrived in CENTCOM area of responsibility (AOR).
According to the description, the Boeing Stratofortresses "can perform strategic attack, close-air support, air interdiction, offensive counter-air and maritime operations to support stability in the region.
Earlier the Pentagon released a video showing four nuclear-capable B-52 bombers taking off for the Middle East.
The Stratofortresses departed Barksdale Air Force Base in Louisiana Tuesday en route to Al Udeid Air Base in Qatar, Fox News report says.
On Sunday National Security Adviser John Bolton announced the deployment of the USS Abraham Lincoln and a bomber task force to the US Central Command region, intended to send a message to Tehran.
Iran dubbed the announcement an act of "psychological warfare."