The drone crashed near the Yahodyn-Dorohusk border crossing during a Russian attack on a gas station.
"There was a very powerful explosion there. [...] Sept. 17 is a special day in terms of today's security situation," Tusk said.
Lt. Col. Jacek Goryszewski, spokesperson for Poland's Operational Command of the Armed Forces, said the drone likely crashed or was shot down 4 kilometers from the Polish-Ukrainian border. Because it was a jet-powered drone approaching at high speed, Poland scrambled fighter jets.
Prior to the incident, Ukrainian monitoring channels had warned of drone movement toward the border with Poland.
Ukraine's State Border Guard Service earlier denied reports of a strike on the Yahodyn border crossing itself. According to border agency spokesperson Andrii Demchenko, there were no hits on border infrastructure, including the crossing point.
On Sept. 13, Russian forces attacked a passenger train locomotive with a drone at Yahodyn station, 2 kilometers from the Polish border. No one was injured. Shortly before the strike, a diplomatic train carrying European politicians from Kyiv, including former U.K. Prime Minister Boris Johnson, had been at Yahodyn station.
Ukrainian Railways later clarified that a different train, carrying former CIA Director David Petraeus, was at the station at the exact moment of the attack.
The U.S.-based Institute for the Study of War (ISW) has reported that Russia's strike near the Yahodyn-Dorohusk international border crossing was intended to injure or kill current or former European government officials traveling from Ukraine.