House Foreign Affairs Committee Chairman Eliot Engel Eliot Lance EngelHouse panel halts contempt proceedings against Pompeo after documents turned over Engel subpoenas US global media chief Michael Pack The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (D-N.Y.) is demanding the State Department turn over documents related to possible security threats to former U.S. Ambassador to Ukraine Marie Yovanovitch Marie YovanovitchGrand jury adds additional counts against Giuliani associates Lev Parnas and and Igor Fruman Strzok: Trump behaving like an authoritarian Powell backs Biden at convention as Democrats rip Trump on security MORE after newly released evidence suggests she was under surveillance.

Engel requested information from the department be delivered by next week in a letter sent to Under Secretary of State Brian Bulatao on Wednesday.

“I share the Department’s deep resolve that the safety and security of our diplomats is of paramount importance,” Engel wrote. “Given the profound risk that these new revelations expose, it is imperative that Congress be fully informed about the threats against Ambassador Yovanovitch and the Department’s response to them, in order to perform its Constitutionally mandated oversight function and to determine any legislative responses necessary to mitigate such threats in the future.”

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Engel’s letter cites the additional evidence the four House committees at the center of President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE’s impeachment trial released Tuesday. The new information was provided by Lev Parnas, an associate of Trump’s personal lawyer Rudy Giuliani Rudy GiulianiGrand jury adds additional counts against Giuliani associates Lev Parnas and and Igor Fruman Juan Williams: Breaking down the debates Giuliani criticizes NYC leadership: 'They're killing this city' MORE.

The information includes communications between Parnas and Connecticut congressional candidate Robert Hyde that hinted the ambassador was being watched.

“The strong implication from these messages is that someone with detailed knowledge of the Ambassador’s whereabouts and security protocols was providing that information in real time to Mr. Hyde and Mr. Parnas,” Engel wrote. “I cannot overstate the profound security risk that this poses to the U.S. mission and our interests in Ukraine.”

A spokesperson for the State Department was not immediately available for comment.

Engel is requesting documents related to Parnas, Hyde, as well as any risks to the the security of the Embassy in Kyiv —including but not limited to Yovanovitch — between Jan. 1 2019 and the present.

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Yovanovitch’s lawyer Lawrence Robbins called for an investigation into the potential monitoring on Tuesday.

Sen. Bob Menendez Robert (Bob) MenendezKasie Hunt to host lead-in show for MSNBC's 'Morning Joe' Senators ask for removal of tariffs on EU food, wine, spirits: report VOA visa decision could hobble Venezuela coverage MORE (D-N.J.), the top Democrat on the Senate Foreign Relations Committee, called for an immediate briefing on the messages.

The new revelation comes as the impeachment process moves forward. The articles the House voted on at the end of last year were sent to the Senate Wednesday, and a trial will begin next week.