U.S. President Joe Biden says the discovery of top-secret documents at former president Donald Trump’s Mar-a-Lago estate raised concerns that sensitive data was compromised and called it “irresponsible.”

Biden, who rarely does interviews, spoke to CBS program 60 Minutes in a segment that aired Sunday. He said that when he heard about classified documents taken from the White House, he wondered how “anyone could be that irresponsible.”

“And I thought, what data was in there that may compromise sources and methods?” Biden said.

The president said he did not get a heads-up before the Trump estate was searched, and he has not asked for any