The FBI is investigating after a U.S. Border Patrol agent and another person were shot and killed Monday afternoon in Coventry, Vermont, just south of the Canadian border, according to federal officials.

A U.S. Border Patrol agent killed during a traffic stop near the Canadian border worked security duty at the Pentagon during the time of the Sept. 11 attacks.

David "Chris" Maland was a U.S. Border Patrol agent and a military veteran who worked security duty at the Pentagon during the time of the Sept. 11 attacks, according to his family