European Commission President Ursula von der Leyen said Wednesday that the option of shooting down a fighter jet that is intruding into NATO airspace is “on the table.”

Von der Leyen’s comment came after multiple Russian incursions into the airspace of NATO countries this month, including in Poland, Romania and Estonia, which have put the continent on high alert.

“My opinion is we have to defend every square centimeter of the territory,” von der Leyen said in an interview with CNN. “That means if there is an intrusion in the airspace, after warning, after being very clear, of course the option of shooting down a fighter jet that is intruding our airspace is on the table.”

On the sidelines of the U.N. General Assembly on Tuesday, U.S. President Donald Trump said he believes NATO countries should shoot down Russian aircraft in their airspace.

Von der Leyen holds no power to direct military action by EU countries, but as head of the bloc’s executive branch her opinion on the matter is hugely influential.