A federal officer killed while on duty near the Canadian border has been identified as David Maland, a U.S. Air Force veteran who provided security at the Pentagon during the Sept. 11 attacks, according to family members.

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

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.

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.

FBI Albany said they are investigating "an alleged assault on a federal officer in connection with a fatal shooting involving a U.S. Border Patrol Agent."

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.

A U.S. Border Patrol agent was killed in a shooting on Interstate 91 in Coventry, Vermont, just south of the Canadian border, according to the FBI. A suspect in the shooting was also dead. A second suspect was injured and taken into custody, the FBI’s Albany office confirmed.

A U.S. Border Patrol agent was fatally shot on a highway in northern Vermont south of the Canadian border, authorities said.

The agent's death Monday afternoon was confirmed by the FBI and Benjamine Huffman, acting secretary of the Department of Homeland Security in Washington. The injured suspect was taken into custody after the violence on Interstate 91 in Coventry, about 20 miles (32 km) from the Canadian border, the FBI said in a statement.

"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."

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