One person was killed and at least three others were wounded Tuesday afternoon in an active shooting near a polling station in Azusa, CA, reports KTLA.

The incident occurred in the area of West Fourth Street and Orange Avenue, a Los Angeles County Fire Department official told KTLA shortly before 2:45 p.m.

Four people were hit by the gunfire, and one person later died of his or her injuries, according to the Fire Department. Three patients were transported to area hospitals, including two who were taken by helicopter. Their conditions were not immediately known. None of the victims have been identified.

The shooter exchanged gunfire with Azusa (CA) Police Department officers, but they were not hit or injured, a fire official told KTLA.

Amid the search for the shooter, multiple police and SWAT vehicle could be seen on the streets of the residential area, which appeared to be near a school, aerial video from a KTLA helicopter showed.

Two polling places in the area — Memorial Park North Recreation Center and Dalton Elementary School — were also impacted by the shooting, L.A. County Registrar-Recorder/County Clerk Dean Logan tweeted. He described the incident as an "active shooter situation."