Two officers and one Border Patrol employee were injured, including one shot in the knee, a federal spokesperson told USA TODAY. The gunman died.

Border Patrol and local police say the alleged shooter was killed when officers returned fire. An investigation is ongoing.

A 27-year-old Michigan man was shot dead by U.S. Border Patrol agents after opening fire with an assault rifle on a U.S. Border Patrol station in the southern Texas city of McAllen on Monday, local police said.