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

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

A U.S. Border Patrol agent was fatally shot during a traffic stop near the Canadian border on Monday, according to officials.

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

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

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.

Agent David Maland was killed Monday following a traffic stop, a U.S. Customs and Border Protection spokesperson said in a statement.

He had a tremendous respect and pride for the work he did; he truly embodied service over self,” his family said.

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

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.

Coventry is close to the U.S. Customs and Border Protection’s Newport Station, part of the Swanton Sector that encompasses Vermont and parts of New York and New Hampshire. The area includes 295 miles of international boundary with Canada.