Former U.S. national security advisor John Bolton adjusts his glasses during his lecture at Duke University in Durham, North Carolina, U.S. February 17, 2020. REUTERS/Jonathan Drake/File Photo

WASHINGTON (Reuters) -FBI agents searched former Trump adviser John Bolton's Maryland home on Friday morning as part of a national security probe, a source briefed on the matter said.

(Reporting by Steve Holland; writing by Katharine Jackson; editing by Susan Heavey)