NEW YORK and LONDON -- Polish airspace was violated by a "huge number" of Russian drones overnight, the country's prime minister said, a torrent of activity that triggered a response from the NATO country's air force, which scrambled and downed several of the drones.

"Those drones that posed a direct threat were shot down," Prime Minister Donald Tusk said early on Wednesday on social media. "I am in constant communication with the Secretary-General of NATO and our allies."

Military officials in Poland earlier say the country's airspace was "repeatedly violated by drone-type objects" in the overnight hours amid Russian strikes on targets in Ukraine.

"An operation is underway aimed at identifying and neutralizing the objects," the Polish military said in a statement, which urged people to stay at home.

The military said it is "actively working" to locate the downed objects.

The most threatened areas are the areas of Podlaskie, Mazowieckie and Lubelskie.

Earlier, the Polish military said it had scrambled jets and was taking "preventative" action during the "massive attack" carried out by Russia on facilities in Ukraine.

"Polish and allied aircraft are operating in our airspace, and ground-based air defense and radar reconnaissance systems have reached the highest state of readiness," the military said in the earlier statement.