Ukraine has barred Russian men ages 16-60 from entering the country and has raided the Kiev home of an influential Russian Orthodox cleric — the latest escalations since the naval confrontation between the two nations this week.

Ukrainian President Petro Poroshenko tweeted Friday that the travel ban would prevent Russians from streaming into the country and forming “private armies which in reality are representatives of Russian armed forces,” according to a translation by NBC News.

Meanwhile, Ukraine announced Friday that its intelligence agency is investigating a controversial Russian Orthodox Church cleric named “Father Pavlo,” on suspicion that he is inciting a separatist movement.

The cleric is the father superior of Kiev’s most influential monastery; he decried the raid on his home in a live broadcast, the Associated Press reported.

Also Friday, Poroshenko called for NATO ships to be positioned in the Sea of Azov — even though Ukraine is not a NATO country and such a response would be unlikely.

The Sea of Azov is where longstanding hostilities flared on Sunday, with Russia firing on three Ukrainian Navy vessels as they attempted to pass from the Black Sea through a Moscow-controlled straight and into the Sea of Azov.

Russian sailors then captured the vessels and jailed the 24 crew members.

Ukraine responded Monday by instituting 30 days of martial law, under which Poroshenko can control the media and limit peaceful protests and the movement of foreigners.

Poroshenko wore combat fatigues as he told reporters Wednesday that he promised “not to allow the enemy to attack Ukraine.”

The Ukrainian military also began conducting military drills along the Sea of Azov.

On Thursday, President Trump announced he was no longer meeting with Russian leader Vladimir Putin during the weekend’s G-20 meeting in Buenos Aires. Trump said he was scrapping the much-anticipated meeting because Russia had yet to free the arrested crew members.