A police incident has closed Interstate 91 in Vermont, near the border with Canada, on Monday afternoon, state police said. The nature of the police incident, with Vermont State Police called “evolving” in a statement,

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

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