The incident took place at the entrance of the U.S. Border Patrol sector annex in McAllen, a city in southern Texas that borders Mexico, according to the DHS spokesperson. Mosqueda fired dozens of rounds toward the building and agents inside, Rodriguez said.

Benjamin Hanil Song is accused of shooting an Alvarado police officer during an attack on the Prairieland Detention Center.

The July 4 attack is just one in a series of recent attacks against federal immigration officers. On Monday, July 7, U.S. Border Patrol agents in the Rio Grande Valley fatally shot a Michigan man who launched an attack at their McAllen facility before dawn.

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

Benjamin Hanil Song was charged with three counts of attempted murder and three counts of discharging a firearm during a violent act, the FBI announced Wednesday.

A Blue Alert was issued on Wednesday for a man accused of shooting an Alvarado police officer during an attack at a U.S. Immigration and Customs Enforcement detention facility on July 4, according to the Texas Department of Public Safety and the FBI.

The 27-year-old shooter is dead and three officers are injured following an early morning shooting at a CBP station in McAllen, Texas

Ryan Louis Mosqueda, 27, was killed after opening fire on federal and local law enforcement, officials said. Investigators have not determined a motive.

Officials from Euless and Plano are expected to provide an update on a homicide investigation during an afternoon news conference.