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

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.

Governor Phil Scott identified David Maland as the fallen officer, extending his “heartfelt condolences to Agent Maland’s family, friends, and colleagues."

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