Medics took six patients to the hospital, all with gunshot wounds.

OAKLAND, Calif. — At least six adults were injured in a shooting on an Oakland school campus Wednesday, and at least some of the victims were found inside the school, authorities said.

The shooting happened around 12:45 p.m. at Radsdale High School, authorities said. The school serves recent immigrants ages 16-21 who have fled violence and instability in their home countries, according to the school’s website. It is one of four neighborhood schools located on the block in East Oakland.

Officials did not say whether any of the victims may be students age 18 or older.

“The victims were associated with the school and we are currently determining the affiliation,” Oakland Police Assistant Chief Darren Ellison said, but declined to say whether students or teachers were involved.

Allison said police are looking for at least one suspect, but have not arrested anyone.

Three of the injured were taken to Highland Hospital in Oakland, while the other three were taken to Eden Medical Center in Castro Valley. Allison said three people remained hospitalized Wednesday night, two with life-threatening injuries, while one person had been released and two others were expected to be released soon.

John Sasaki, a spokesman for the Oakland Unified School District, said in a statement that district officials “do not have any information other than what Oakland police have reported.” He said counselors were available for students, and he could not say whether schools at the site would be open Thursday.

Television footage showed dozens of police cars and yellow tape lining the street outside the school and students leaving nearby campuses.

City Councilwoman Treva Reed said investigators told her the shooting may be related to an increase in “gang and gang violence.”

James Jackson, chief executive of Alameda Health System, also noted the increase in violence.

“We see almost twice as many victims of violent crime as we see here at our facility (Highland Hospital). So something has changed,” Jackson said.

City Council member Lauren Taylor, who was outside the school, declined to confirm any details about the incident, telling KTVU-TV, “Guns were on our school campuses where our children were supposed to be protected.”

This story has been corrected to indicate that the Associated Press, citing Oakland Mayor Libby Schaaf, misstated the location of the shooting. It was at Rudsdale Newcomer High School, not Sojourner Truth Independent Study.

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