Authorities say a 27-year-old man was killed after opening fire at a U.S. Border Patrol facility in McAllen, Texas.

The shooting was one of several episodes of gun and knife violence in the city over the Fourth of July weekend.

A man with a rifle and tactical gear was shot dead by police after he opened fire at a Border Patrol facility in Texas, the Department of Homeland Security (DHS) has said. Two officers and a border patrol employee were injured in the attack, including one who was shot in the knee. All three were sent to hospital for treatment, officials said.