A San Joaquin County Sheriff’s deputy stands guard in front of a banquet hall at The Outpost shopping center onLucille Avenue near Thornton Road in Stockton on Nov. 30, 2025 where a mass shooting at a children’s birthday party occurred on Saturday, Nov. 29. Four people died and 11 were injured in the shooting.

As the city of Stockton mourns the four people killed at a child's birthday party over the Thanksgiving holiday weekend, little is known about the suspect or suspects responsible.

Investigators have not released a description of the shooter or information about a potential motive for the attack, which claimed the lives of three children and one adult and left 11 others injured. Days after the deadly hail of gunfire broke out at a banquet hall where as many as 150 people were gathered, it's still not clear how many people were involved in the shooting.

Though tips have already begun pouring in, law enforcement officials have pleaded with the public for more information.

"We need everyone who has any information on this to reach out to us," San Joaquin County Sheriff Patrick Withrow said at a news conference on Sunday, Nov. 30. "This is the time for our community to show that we will not put up with this type of behavior where people will just walk in and kill children."

Here's what we know - and what we don't - about the suspect.

Multiple suspects may be at large

Withrow said more than one shooter may have been involved in the attack. Officials are offering a $25,000 reward for information that leads to an arrest.

"With the tips, video, and witness accounts provided so far, detectives are actively working on suspect descriptions and moving toward identifying and locating the individuals responsible for this horrific act," the sheriff's office said in a statement.

Shooting appears targeted, but motive unknown

It's not clear what the motive for the shooting was. Withrow said the attack appears to be targeted, but did not explain why investigators believe that.

"We're going to say that we're confident that this was not a random act," Withrow said at a news conference. "They walked into this area and was probably looking for somebody in particular. Why they did that, what they're part of, who they are — we don't know."

Have any arrests been made?

After the shooting, the Stockton Police Department said it arrested five people, including one juvenile, on conspiracy, weapons and gang-related charges. Heather Brent, a spokesperson for the San Joaquin County Sheriff's Office, told USA TODAY the arrests were unrelated to the shooting.

Contributing: Victoria Franco, The Stockton Record; Christopher Cann, Karissa Waddick and Thao Nguyen, USA TODAY

This article originally appeared on USA TODAY: What we know and don't know about California mass shooting suspect

Reporting by N'dea Yancey-Bragg, USA TODAY / USA TODAY

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