Censor.NET reports citing RIA Novosti.
"Our relevant agencies are dealing with the situation. We believe it to be an illegal provocation conducted by secret services of Ukraine in the territory of the Russian Federation regarding Russian citizens," Lavrov said.
Earlier, the Defense Ministry of Russia announced that Ukraine's Security Service (SBU) allegedly detained and evacuated from occupied Crimea two Russian military.
SBU, in turn, said the soldiers were detained at the border with occupied Crimea and are deserters who joined the Russian army after the Crimea occupation.