Masked Ukraine soldier issues an ultimatum in viral Twitter video

Russian soldiers have been sent an ultimatum in a viral video from a mysterious masked soldier – the latest example of Ukraine using social media to provoke its enemy.

The video depicts an armed man in a mask and Ukrainian military uniform – calling himself Captain Himars – standing in front of a rocket launcher site as he addresses the Russian army.

The captain addresses the camera in between blasts caused by the launching of Himars (M142 High Mobility Artillery Rocket System) rockets in the background of the video.

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The Himars light multiple rocket launcher, or High Mobility Artillery Rocket System, can fire a six-pack of rockets, and was donated to Ukraine by America as part of the country's ongoing support of the nation in the face of Russian aggression.

The video is the latest example where social media has played a part in producing propaganda and provocation toward Russia by Ukraine.

In December, after being provided by Norway with advanced surface-to-air missile systems (NASAMS), the Ukrainian air force mocked Russian by posting a video showing a series of pictures of their planes having been shot down by the systems.

In the video, the soldier appears to be armed with an Israeli-made IWI Tavor TAR-21 rifle.

He says: "Russian soldier! My name is Captain Himars. I am your chance to come home alive.

"Give me the coordinates of the places where the armored vehicles are concentrated, and headquarters and ammunition are located, and I will not hit your quarters.

"I will destroy only tanks, artillery shells and fuel. Then no-one will send you on the attack to the slaughter."

He ended: "This is how you save your life and the lives of your friends."

The soldier's speech concludes with the firing of two more rockets in the video, although he remains solid despite the blasts throughout the video.

The final shot of the video shows the camera tracking a final rocket into the night sky.

The ultimatum comes after 400 Russian soldiers were reportedly killed by a missile attack in the Russian-controlled part of the eastern Donetsk region, according to claims made by the Strategic Communications Directorate of Ukraine's Armed Forces.