A White House adviser on Europe and Russia issues has been placed on administrative leave pending a security-related investigation, two people with knowledge of his exit said Sunday.

Andrew Peek was escorted off the White House compound on Friday, according to one of those familiar with his departure…

Peek, former deputy assistant secretary of state for Iraq and Iran, has been in the position since November. His two predecessors in that position — Tim Morrison and Fiona Hill — both testified in the House impeachment inquiry of President Donald Trump.