The Department of Homeland Security’s U.S. Customs and Border Protection said in a statement that the agent was killed in the line of duty, although it did not provide details.

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

The family of a U.S. Border Patrol agent who was killed in Vermont during a traffic stop near the Canadian border says he was a military veteran who worked security duty at the Pentagon during the time of the Sept.