A section of Interstate 91 in Vermont was closed Monday after Vermont State Police said a U.S. border patrol agent was shot.

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.

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

Federal agents are investigating after a US Border Patrol agent was shot and killed Monday afternoon on the highway in Vermont.

A German national suspect on a legal visa allegedly killed a United States Border Agent during a traffic stop in Vermont near the Northern border, Fox News Digital has confirmed.

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.

Officials said the agent was shot on Interstate 91, which was closed for several hours near the border with Canada.

Sources tell WCAX News that a third person may have been involved with suspects that killed a Border Patrol agent in Vermont.

The FBI says Border Patrol Agent David "Chris" Maland was fatally shot during a traffic stop on Interstate 91 in the North Country of Vermont.

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.