This is stated in a message on the website of the Russian Foreign Ministry. 

“The Ukrainian side has been warned that in the event of continued hostile actions against employees of Russian diplomatic and consular missions in Ukraine, on the basis of reciprocity, additional measures will be taken against the personnel of the Ukrainian embassies, consulates general and consulates in Russia,” the Russian foreign ministry said.

Earlier it was reported that an employee of the Ukrainian embassy was declared persona non grata in Russia in connection with the unfriendly actions of the Ukrainian side.

The Ukrainian diplomat was offered to leave Russia by April 30.