U.S. Director of National Intelligence Tulsi Gabbard said on Tuesday that she had revoked security clearances of 37 current and former intelligence professionals whom she accused of "politicizing and manipulating intelligence.

The US government security clearances of at least 37 current and former national security officials have been revoked by Director of National Intelligence Tulsi Gabbard, according to a memo obtained by CNN.

The move comes as her office has placed escalating scrutiny on Obama administration officials involved in a review of Russian election interference.