"We would also wish that the drone attack on Poland was a mistake. But it wasn't. And we know it," Prime Minister Donald Tusk said in a message posted on social media.

Trump, while speaking to reporters on Thursday, suggested that a Russian drone incursion into Polish airspace earlier this week “could’ve been a mistake.”

“We would also wish that the drone attack on Poland was a mistake. But it wasn’t. And we know it,” he said.