A man has shot a military commissioner at an enlistment center in Siberia who was recruiting soldiers amid rising tensions over the Kremlin's unpopular partial military mobilization to support Russia's ongoing unprovoked invasion of Ukraine.

The governor of the Irkutsk region, Igor Kobzev, said on September 26 that the military commissioner, who was shot in the city of Ust-Ilimsk, is in grave condition at a local hospital.

Media reports identified the shooter as 25-year-old Ruslan Zinin, who had been called to report for mobilization that day.

The Babr Mash Telegram channel posted a video reportedly taken at the moment of the shooting that showed paramedics taking a wounded man away and the moment the shooter was detained.

Russia's Investigative Committee said it has launched a probe into "attempted murder and the illegal possession, transportation, and use of a weapon."

The mobilization for the war in Ukraine announced by President Vladimir Putin last week has been met with countrywide protests and the mass flight of men potentially eligible for military duty from Russia.

Almost 2,500 people have been detained in Russian towns and cities for protesting against mobilization, while several military enlistment centers and other administrative buildings in the country have been targeted in arson attacks in recent days.

The largest protest against the mobilization took place over the weekend in Makhachkala, the capital of the North Caucasus region of Daghestan.

With reporting by Babr Mash, Interfax, Baza, Mash, and TASS