The San Joaquin County Sheriff’s Office added one person on Sunday to an updated number of people injured by gunfire during a mass shooting at a birthday party in Stockton on Saturday. 

The Sheriff’s Office said it had confirmed that 15 people were struck by bullets. Four were killed and 11 were injured. 

The victims who were killed were aged 8, 9, 14, and 21 years old, the Sheriff’s Office said Sunday. 

The Sheriff’s Office said there are indications that the shooting at the Stockton banquet hall in the 1900 block of Lucile Avenue was targeted but did not release any information about a possible suspect or description of any suspected shooter in an update Sunday afternoon. 

Stockton Mayor Christina Fugazi said on Facebook Sunday that she could not sleep on Saturday night as she thought about the trauma that children at the birthday party had witnessed. She called the shooting an act of terror and warned that anyone helping the shooter evade capture was putting themselves at risk of prosecution.

“And let us call this what it is,” Fugazi wrote. “Gang violence exists in cities across the country, but this act was a pure act of terrorism. A complete, cowardly Terrorist Act!”

Vice Mayor Jason Lee said he was “devastated and angry to learn about the mass shooting at a child’s birthday party.”

“Violence touched my life as a young person, and seeing our own children, parents, and neighbors go through this shakes me deeply,” Lee said on social media.

“Our community deserves to know the truth, and the families impacted deserve justice and every resource available to support them,” Lee said.

Gov. Gavin Newsom offered his condolences in a statement on social media as he learned about the young ages of the victims. 

“Our hearts break for their families and the entire Stockton community,” Newsom said on X. 

The San Joaquin County Sheriff’s Office said it was grateful for the tips that have been reported and urged anyone with information about the shooting to contact the Sheriff’s Office. 

“Community assistance is vital in helping us identify those responsible and bring justice to the victims and their loved ones,” the Sheriff’s Office said.

Other agencies involved in the investigation include the Manteca Police Department, Stockton Police Department, Tracy Police Department, Lathrop Police Department, Delta Police Department, Stockton Unified School District Police, the California Highway Patrol and multiple federal agencies, according to the Sheriff’s Office.

A reward of up to $25,000 is being offered by Stockton Crime Stoppers, which can take tips anonymously at (209) 946-0600.