Russian warships are reportedly planning to conduct rocket tests in the Mediterranean off the Libyan coast later this month, according to news reports.

As a reaction to such a grave step to be taken by the Russians, the United Sates Federal Aviation Authority (FAA) warned Wednesday aircraft passing through the airspace of such an operation.

According to reports, the Russian navy will conduct the drills anytime from May 24 to 27.

Russia issued a notice to airman (NOTAM) warning of an impending “rocket test” off the eastern coast of Libya next week.

The area effected runs off the shore of Libya from roughly the Egyptian border to 150 miles west, and out to see about 100 miles, according to news reports.

Russia is a supporter of the eastern government and its forces of Dignity Operation, led by Khalifa Haftar, who visited Moscow and was even given a tour on a Russian aircraft carrier earlier this year, when he allegedly made a deal for arms supply by the Russians.