DoD Secretary Chuck Hagel to resign

WASHINGTON (AP) – A senior administration official says Secretary of Defense Chuck Hagel is resigning from President Barack Obama’s Cabinet.

Hagel, a former Republican senator, has served as Pentagon chief since early 2013. Obama is expected to announce the resignation Monday.

The official insisted on anonymity because this person was not authorized to discuss the matter publicly ahead of Obama’s official announcement.

This story will be updated with more information as it becomes available.