A 10-year-veteran police trooper was shot in the head early Friday, Aug. 23, owing to an exchange of gunfire, an Illinois State Policeman said.

The shooting took place at 5:26 a.m. in the 1400 block of North 42nd Street in East St. Louis, Illinois, when the 33-year-old trooper, whose name has not been publicized, was executing a search warrant, Illinois State Trooper Josh Korando said.

The officer was shot in the head and received life-threating injuries, according to an Illinois State Police release. When he got to the hospital, he was still alive and is currently in the Intensive Care Unit.

Police surrounded a home near 42nd Street and Caseyville Avenue shortly after the incident happened.

At least one person was arrested at about 6 a.m. and a total of three people were taken into custody shortly after.

Dorothy Burns, a neighbor, said she heard a commotion in the area around 5:30 a.m.

“All I heard is boom boom — two shots,” she said. “Then it sounded like an explosion and I saw smoke like they were trying to smoke them out.”

The investigation is ongoing.