President Trump warned Sunday that the US will defend Poland and the Baltic countries if Russia’s aggression escalates after a series of incursions into the airspace of the NATO allies.

Poland and its allies have scrambled fighter jets to ensure the safety of Nato airspace after a Russian airstrike near Ukraine’s western border.

President Donald Trump may meet with Ukrainian President Volodymyr Zelenskyy at U..N summit as NATO faces pressure to enforce no-fly zone over Ukraine.

Credit ratings agency Moody's lowered Poland's outlook to "negative" from "stable" on Friday amid rising spending pressure and political gridlock. "Our decision to change the outlook to negative reflects a materially weaker outlook for fiscal and debt metrics compared to our earlier expectations,

"If it had all happened at once, maybe you could call it an accident. But six hours of drones? That’s a test – a way to see what the West would do. And we have to respond like it’s a test," Kellogg said.

"We will do more to ensure that our people are safe," Polish Deputy Prime Minister Radoslaw Sikorski told Newsweek.

Responding to President Trump, Poland's leader said, "we would also wish that the drone attack on Poland was a mistake. But it wasn't."

Moody’s Ratings signaled it may lower Poland’s credit score as the country struggles to overcome political tensions complicating efforts to curb its budget deficit.

Authorities say Polish and allied aircraft were deployed in a “preventive” operation in Poland’s airspace because of a threat of drone strikes in neighboring areas of Ukraine.

NATO allies Poland and Romania both scrambled fighter jets to respond to Russian drone and missile attacks in Ukraine on Saturday.

In the week since NATO fighter jets scrambled to shoot down multiple dozens of Russian drones that had crossed into alliance airspace in Poland, US and Western intelligence officials have been unable to determine whether the incursion was accidental or an intentional effort by Russia to probe western air defenses and gauge NATO’s response.

Poland neutralized a drone flying over government buildings on Monday evening and detained two Belarusian citizens over the incident, said Prime Minister Donald Tusk.