HIMARS started hitting Russian military positions in Ukraine VIDEO

Video uploaded on social media last week allegedly shows US long-range rocket systems being fired by Ukrainian troops from an undisclosed location in Ukraine.

Ukraine said on June 23 that it had received High Mobility Artillery Rocket Systems (HIMARS), a powerful long-range weapon system from the US in a hope that it can help turn the tide on Russia's invasion, The Sun reports.

The uploader of the video describes the weapon as an M142 HIMARS. Reuters was not able to verify the location or date the video was filmed. The video shows the firing of what purports to be a High Mobility Artillery Rocket System (HIMARS). The shape of the weapon matches file images of the rocket system.

Meanwhile, Washington has said it has received assurances from Kyiv that those longer-range weapons would not be used to attack Russian territory, fearing an escalation of the conflict.

Moscow's forces are advancing in Ukraine's east in a bid to capture the industrial heartland known as the Donbas where Ukraine fears some of its troops could be encircled by a Russian pincer.

Moscow has warned it will strike targets in Ukraine that they "have not yet been hitting" if the West supplies longer-range missiles to Ukraine for use in high-precision mobile rocket systems.