A shooter still on the loose killed at least four people when, authorities say, he or she opened fire Saturday night on a banquet hall in Stockton, California, during a birthday party.
Eleven more people were injured in what the local sheriff called a particularly callous and brutal crime.
"These animals walked in and shot children at a children's birthday party, and none of us should stand for that," Patrick Withrow, the sheriff of San Joaquin County said at a news conference Sunday.
Here's what we know about the shooting so far.
What happened?
At least 100 people were gathered at the birthday party, which was at a banquet hall on the 1900 block of Lucile Avenue in Stockton, when gunfire broke out shortly before 6 p.m.
The attack started inside the banquet hall and spilled out into the street. Multiple vehicles that appeared to have been hit by gunfire were towed as possible evidence.
Who are the victims?
There are 15 total victims of the shooting, four of whom were killed, including three minors.
Identities of the deceased have not yet been released; they are ages 8, 9, 14 and 21.
Eleven more people were hospitalized. At least one was in critical condition Sunday, and the 10 others' conditions were not available, Withrow said.
A vigil held Sunday in honor of the victims included clergy leaders, relatives and community members who called for change and activism in the community to avoid such violence in the future.
"Everybody deserves to live in a safe city," Stockton Mayor Christina Fugazi said at the vigil.
The Stockton Unified School District said in a statement, "We will do all we can to support our students and our community," and added that counselors and mental health clinicians will be available at all 55 district schools.
Who is the suspect?
Authorities are still searching for an unidentified person. Law enforcement officials have said they may be looking for multiple shooters.
Withrow said Sunday that "there appears to be multiple shooters," noting that shell casings and rounds found at the scene — including firearms discovered atop a roof — were still being processed for conclusive evidence.
It is not clear whether anyone returned fire.
Authorities are asking the public for help identifying and tracking down potential suspects. They have urged anyone with information about the attackers to reach out and are seeking video from Saturday night.
There is a $25,000 reward for any information that leads to an arrest.
"Whoever did this: You don't need to see the light of day again," Fugazi said.
