SAN ANTONIO – San Antonio Police Chief William McManus addressed the death of a 4-year-old boy who was fatally shot on the city’s east side late Wednesday night.

Chief McManus said they believe gang activity is starting up again on the east side of San Antonio after the drive-by shooting that occurred Wednesday afternoon. That shooting sent multiple people to the hospital.

Police believe Wednesday night’s shooting could be in retaliation for the previous shooting.

“We don’t know just yet but we got all of our intelligence resources and operational resources trying to figure out if that was a retaliation for the first drive-by,” McManus said in a press conference.

RELATED | 4-year-old boy fatally shot in drive-by shooting on east side

Neighbors reported the gunfire shortly before midnight on Wednesday at the corner of Hub Avenue and Gay Boulevard on the city’s east side.

When police arrived, they found the 4-year-old De-Earlvion Whitley shot in the head and the boy’s mother shot in the leg. The woman was taken to the hospital for treatment and the child died at the scene.

Chief McManus said SAPD had police forces in the area at the time of the shooting. He said the task forces were set up and stopped two vehicles that could have been part of the incident. He said the officers arrested four individuals whose cars were full of guns and ammunition.

“A message to those who did the shooting last night is we will arrest you at some point,” McManus said. “It may not be today or tomorrow but we will arrest you at some point. We will not stop until we arrest you.”

Chief McManus said they believe the intended victim was connected to the home.

Watch the full press conference below: