The Vermont State Police are assisting federal authorities after a shooting involving a Border Patrol agent. They said it happened around 3:15 p.m. Monday on Interstate 91. The FBI is leading the investigation.

The fatal encounter occurred around 3:15 p.m. EST Monday on Interstate 91 in Coventry, about 13 miles south of the Canadian border.

A US Border Patrol agent was killed Monday in northern Vermont south of the Canadian border, authorities said.

One suspect was dead and another was injured and taken into custody after a U.S. Border Patrol agent was fatally shot in the line of duty in Coventry.

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

A United States Border Patrol agent was gunned down during a traffic stop in Vermont near the Canadian border, officials have confirmed. It happened around 3:15 p.m. Monday on Interstate 91 in Coventry, 20 miles from the Northern border, according to the Department of Homeland Security.

A U.S. Border Patrol agent was shot and killed in northern Vermont on Monday afternoon, the FBI said in a statement later that evening.

U.S. Air Force veteran and 9/11 Pentagon security responder Chris Maland is the first Border Patrol agent killed in the line of duty since 2014.

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.

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.

"On Monday, January 20, Border Patrol Agent David C. Maland passed away in the line of duty. Agent Maland succumbed to injuries caused by gunfire following a traffic stop in Coventry, Vermont. U.S. Customs and Border Protection’s thoughts and prayers are with Agent Maland’s family during this difficult time."