A state senator in Vermont has identified the U.S. Border Patrol agent killed on Monday.

Vermont State Sen. Russ Ingalls, an Essex County Republican, identified the agent shot to death at the U.S. Border Patrol’s Swanton Sector as David Maland while speaking on the state senate floor Tuesday, according to a report from WPTZ, the NBC affiliate in Burlington, Vt.

Maland’s death was announced Monday night by the Albany, New York, FBI field office. A statement said that the agent was killed along with “one subject” on Interstate 91 in Coventry, Vt. Another “subject” was injured and is in custody.

Acting Secretary of Homeland Security Benjamine Huffman also confirmed the shooting, saying in his own statement that “a Border Patrol agent assigned to the US Border Patrol’s Swanton Sector was fatally shot in the line of duty.”

“Every single day, our Border Patrol agents put themselves in harm’s way so that Americans and our homeland are safe and secure. My prayers and deepest condolences are with our Department, the Agent’s family, loved ones, and colleagues,” Huffman continued.

Huffman confirmed that DHS was investigating. The FBI said it’s also working with the U.S. Border Patrol and the Vermont State Police.

On Tuesday, U.S. Senator Jeanne Shaheen, a New Hampshire Democrat, said that she will continue to monitor the situation as more information becomes available and will “keep advocating for more federal resources to ensure that U.S. Border Patrol agents have what they need to safely do their jobs.”

The senator added, “U.S. Border Patrol agents put their lives on the line every day to keep Americans safe and secure. Yesterday’s loss of an officer in the line of duty is a tragedy, and my thoughts are with the agent’s family and colleagues.”