California Democrat Rep. Jackie Speier blasted the Trump administration on Thursday after it refused to turn over information about a whistleblower.

In a five-hour closed-door hearing on Thursday, the Inspector General of the Intelligence Community reportedly refused to hand over information about a whistleblower, who allegedly felt a duty to report on President Donald Trump’s connections with a foreign leader.

“We’ve got a very grave situation on our hands,” Speier was quoted as saying. “He is answering some questions not on the specific subject matter but it’s deeply troubling.”