MOSCOW, November 17. /TASS/. Russia has expelled a number of Polish diplomats from Moscow in response to the earlier expulsion of Russian diplomats from Poland, the Russian Foreign Ministry said on Monday.

“Unfortunately, Poland’s authorities have indeed taken such an unfriendly and ungrounded step,” the ministry said.

“Therefore, the Russian side has adopted adequate response measures, and several Polish diplomats have already left the territory of this country for the activity which is incompatible with their status,” the statement reads.

The ministry gave no details on the number of Polish diplomats that have been ordered to leave Russia.

Polish media reported in mid-October that two persons had been detained on suspicion of spying for Russia. One of the suspects is the country’s Defense Ministry’s officer, who had access to classified documents concerning the Polish Army and NATO.