COVENTRY, Vt. (TNND) — A U.S. Border Patrol agent shot and killed during a traffic stop in northern Vermont Monday was a veteran of the U.S. Air Force who worked security at the Pentagon during the Sept. 11 attacks, according to his family and officials.

Agent David “Chris” Maland died in a shooting following a traffic stop, the FBI said. A second person killed in the incident was a German national in the country on a current visa, authorities said.

The federal officer killed while on duty near the Canadian border has been identified as a U.S. Air Force veteran who provided security at the Pentagon during the Sept. 11 attacks.

An investigation was underway on Tuesday near the United States’ border with Canada, where an agent was fatally shot “in the line of duty,” authorities said

The FBI is investigating a Border Patrol agent-involved shooting, according to a statement from the Vermont State Police.

A Customs and Border Protection source has identified the Border Patrol agent shot and killed during a traffic stop Monday as David Maland, 44.

The name of a Border Patrol agent killed in a shooting that left one suspect dead and another injured and in custody was released on Tuesday.

David "Chris" Maland, the U.S. Border Patrol agent allegedly killed by a German national during a traffic stop near the Vermont-Canada border on Monday, was an Air Force veteran.

Border Agent shot dead during traffic stop in Vermont was an Air Force veteran who worked at Pentagon during 9/11 - Agent David Maland, 44, was a ‘devoted agent who served with honor and bravery,’ his

U.S. Border Patrol Agent David Maland, a 44-year-old military veteran who served as Pentagon security during 9/11, was killed during a traffic stop near Vermont’s Canadian border.

Members of the Vermont Senate took a moment to remember David "Chris" Maland, 44, a U.S. Border Patrol agent who was shot and killed in the line of duty near the U.S.-Canada border Monday afternoon. Sen. Russ Ingalls, who represents the northern Vermont county where Maland was killed, was emotional on the Senate floor.