About a dozen F/A-18 fighter jets from the USS Theodore Roosevelt aircraft carrier have flown to a military base in the Middle East, as part of the Pentagon’s effort to help defend Israel from possible attacks by Iran and its proxies and to safeguard US troops, according to a US official, Paralel.Az reports citing AP.

The F/A-18s and a E-2D Hawkeye surveillance aircraft took off from the carrier in the Gulf of Oman and arrived at the undisclosed base on Monday, the official says.

US Defense Secretary Lloyd Austin ordered the increased military presence in the region as officials worry about escalating violence in the Middle East in the wake of the killings last week of a senior Hezbollah commander in Lebanon and Hamas’ top political leader in Iran, in suspected Israeli strikes. Both groups are backed by Iran.

The Navy jets’ land-based deployment is expected to be temporary, because a squadron of Air Force F-22 fighter jets is enroute to the same base from their home station in Alaska. The roughly dozen F-22s are expected to arrive in the Middle East in the coming days, says the official.

It’s not clear how long all of the aircraft will remain together at the base, and that may depend on what — if anything — happens in the next few days.