WASHINGTON - The Pentagon announced Sunday it would send the Terminal High Altitude Area Defense battery and its crew as Israel considered retaliatory attacks against Iran.
Major General Pat Ryder, Pentagon spokesman, said in a statement that Defence Secretary Lloyd Austin authorised the deployment of the THAAD battery at the direction of President Joe Biden.
He said the system will help bolster Israel's air defences following Iran's ballistic missile attacks on Israel in April and October.
The delivery of the sophisticated missile defence system risks further inflaming the conflict in the Middle East despite widespread diplomatic efforts to avoid an all-out war.
The Iranian warning came in a post on social platform X long associated with Foreign Minister Abbas Araghchi, who noted the earlier reports that the US was considering the deployment.
Israeli forces and Hezbollah fighters in Lebanon have been clashing since October 8, 2023, when the Lebanese militant group began firing rockets over the border in support of its ally Hamas in Gaza. Late last month, Israel launched a ground invasion into Lebanon.
Israel is widely believed to be preparing a military response to Iran's October 1 attack when it fired roughly 180 missiles into Israel.
In a brief exchange with reporters before leaving Florida on Sunday, Mr Biden said he agreed to deploy the THAAD battery "to defend Israel."
He spoke at MacDill Air Force Base in Tampa after making a quick visit to see the damage caused by Hurricane Milton and meet with first responders, residents and local leaders.
Mr Ryder said in his statement the deployment "underscores the United States' ironclad commitment to the defence of Israel, and to defend Americans in Israel, from any further ballistic missile attacks by Iran."
It was not immediately clear where the THAAD battery was coming from or when it would arrive.
Lieutenant Colonel Nadav Shoshani, an Israeli army spokesman, declined to provide any timeline for its arrival but thanked the US for its support.
The US deployed one of the batteries to the Middle East along with additional Patriot battalions to bolster protections for US forces in the region late last year after the October 7 attack on Israel by Hamas militants.
Mr Ryder also said that the US sent a THAAD battery to Israel in 2019 for training.
It is not unusual for the US to have a limited number of troops in Israel, which the US considers a key regional ally.
There generally has been a small number of forces there consistently as well as routine rotational deployments for training and exercises.
According to an April report by the Congressional Research Service, the Army has seven THAAD batteries.
Generally, each consists of six truck-mounted launchers, 48 interceptors, radio and radar equipment and requires 95 soldiers to operate.
The THAAD is considered a complementary system to the Patriot, but it can defend a wider area. It can hit targets at ranges of 150 to 200 kilometres.