[4][5] From April 2014 to March 2019, he was the author and host of AgitProp ("agitation and propaganda") program on Russia-24 channel, owned by VGTRK.

The journalist complained about the management of "Russia-24", placing the episodes dedicated to the domestic policy issues early in the morning or late at night.

On February 23, Serbian Foreign Minister Vuk Jeremić called his Russian counterpart Sergei Lavrov over the issue and sent a letter of protest to the All-Russia State Television and Radio Company.

President Boris Tadić promised to touch the issue on February 25, during the scheduled visit of First Deputy Prime Minister of Russia and presidential candidate Dmitry Medvedev to Belgrade behind closed doors.

After the talks, Russian Foreign Minister Sergei Lavrov publicly dismissed Syomin's comments voiced on state-run television as nonsense and his personal opinion.