The school posted an update on its Instagram page on Tuesday, sharing about the "heartbreaking news" and offering condolences for the victim and his family.
On Monday, Oakland police confirmed that a 12-year-old boy was taken into custody, and Madison Park says that police recovered the gun used in the shooting.
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"News of a firearm on a school campus is devastating for our students, families, school staff, especially because our schools are considered places of peace and learning for our young people," Madison Park said in its post.
Following the shooting, the school went on lockdown as the staff called 911. District staff were on campus Monday to help families and school staff.
Madison Park also mentioned that because the shooting involves minors, they will not be able to provide much more information or clarify any rumors as the investigation continues.
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On Tuesday, Oakland community leaders say this type of violence has to stop.
"A 13-year old shot by a 12-year-old at school here in Oakland," said Rev. Harry Williams, founder of Ground the game ministries. "Our biggest problem in Oakland is not bullets it's apathy."
Community leads spoke out against the violence on the steps of City Hall. Many of them say they are begging for Oakland to come together.
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"It is a terrible experience for all of us to have to come before our city and beg for the help that we need," said Oakland Police Chief Leronne Armstrong. "We need to say a 12-year-old should not be able to get ahold of a gun in the first place, let alone bring it to school."