Charlotte, N.C. ― Four law enforcement officers were killed and four others were shot and wounded Monday in east Charlotte, authorities said.

The U.S. Marshals service and the Charlotte-Mecklenburg Police Department said the U.S. Marshals Fugitive Task Force, made up of multiple agencies, was attempting to serve a warrant in the area when it engaged in gunfire with a subject. Four on the task force were killed and four others, including four CMPD officers, were shot and injured. The U.S. Marshals Service did not immediately identify the victims.

Three officers died at the scene. Charlotte-Mecklenburg police officer Joshua Eyer died a few hours later at the hospital, officials said. Eyer was named the officer of the month for the force for April a few weeks ago.

At least one shooting suspect died in the front yard after CMPD cleared the scene, the department said, and two other occupants of the home were being questioned.

“All of a sudden it sounded like Vietnam out there,” said Larry Mackey, who lives in the neighborhood and who said he saw the firefight.

When an Observer reporter called him around 3:45 p.m., Mackey estimated that there were 30 or 40 police cars at the scene.

“There was a litany of gunfire, just an enormous amount,” said a neighbor, who heard pops from inside her shower. She bought a home three lots down from the scene, and requested to remain anonymous, citing safety concerns.

The home had police cars in front of it twice since she moved in in October, she said. Now, it was surrounded by at least 150 officers and snipers perched on neighbors’ homes. A negotiation tent popped up around 3 p.m. — after officers “dragged” one of the shot officers into an ambulance, she said.