Rep. Devin Nunes said lawmakers have been told about "strange requests" to use government resources to monitor journalists.

The top Republican on the House Intelligence Committee stressed Wednesday evening that he has not confirmed the allegations but is seeking answers from the State Department.

During an interview with Fox News host Sean Hannity, Nunes talked about a letter by former GOP congressman Pete Sessions to Secretary of State Mike Pompeo that he said raised concerns that former U.S. Ambassador to Ukraine Marie Yovanovitch was "not serving the Trump administration well" and was removed from her post earlier this year.

"We also have concerns that possibly they were monitoring press from different journalists and others," Nunes said. "That we don't know, but we have people who are giving us this information and we're going to ask these questions to the State Department and hopefully they're going to get the answers before she comes in on Friday."

With Yovanovitch set to testify before the House this week as Democrats ramp up their impeachment inquiry spurred by Trump's communications with Ukraine, Nunes said Republicans "will give her an opportunity to answer these questions."

Hannity said he has heard from multiple sources who "believe there is evidence that government resources were used to monitor communications" of American journalists, including new Fox News contributor John Solomon, related to Ukraine and posited that Yovanovitch may have been involved.

But Nunes would not get into specifics and noted that if there was some sort of surveillance, it may have been done properly.

"What I've heard — and I want to be clear — there's a difference. What I've heard is that there were strange requests, irregular requests to monitor not just one journalist, but multiple journalists. Now perhaps that was OK. Perhaps there was some reason for that — that it can be explained away. But that's what we know and that's what we're going to be looking into," the California Republican said.

Solomon appeared on the show after Nunes and also preached caution. He said he "received multiple contacts from the intelligence community suggesting that there may have been inappropriate monitoring of my communications" but added that it's not yet clear what exactly transpired and that what may have happened was just monitoring of his social media.

"I think we need to dig in more. Ambassador Yovanovitch should be given an opportunity and Secretary of State Pompeo should tell us what happened," Solomon said.