Russia says the US has deployed the M142 High Mobility Artillery Rocket System (HIMARS) launchers from Jordan to its base in southern Syria, warning that the equipment could be used against Syrian government forces.

"The United States has moved two HIMARS multiple rocket launchers from Jordan to the At-Tanf US special forces base," the Russian Defense Ministry said in a statement released on Thursday.

It also accused the US, which is purportedly fighting terrorists, of having “repeatedly issued strikes on Syrian government forces fighting Daesh near the Jordanian border.”

Thus, the ministry said, "it's not hard to guess that similar strikes will be continued against contingents of the Syrian army in the future using HIMARS.”

The deployment of any type of foreign weaponry on Syrian soil “must be approved by the government of the sovereign country," it pointed out.

The statement further said Moscow is closely monitoring the situation on the Syrian-Jordanian border.

On Wednesday, an intelligence source first reported the US relocation of the HIMARS from Jordan to Syria.

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The town of At-Tanf, home to a US base, is located in Syria’s Homs Province near a Syria-Iraq border crossing on the main Baghdad-Damascus highway.

On June 6, US warplanes attacked a Syrian military position on the road to At-Tanf, killing an unspecified number of people and causing some material damage.

The US claimed that the Syrian forces who came under the attack posed a threat to its forces and their terrorist allies in Syria.

On May 18, the US carried out a similar strike on a Syrian military convoy near At-Tanf.

The Syrian army has denounced the attacks, saying they demonstrate US support for terrorism, at a time when the Syrian army and its allies are making gains against Daesh militants.

The US and its allies have been bombarding what they call Daesh positions inside Syria since September 2014 without any authorization from the Damascus government or a UN mandate.

They have been accused of targeting and killing civilians, while failing to fulfill their pronounced goal of destroying Daesh.