CASTRO VALLEY -- The Castro Valley Unified School District has launched an internal investigation into reports of an inappropriate relationship between a teacher and a high school student, district officials said Monday.

Administrators at Castro Valley High School, 19400 Santa Maria Ave., were made aware of the allegations Friday afternoon, and the teacher was placed on paid administrative leave, said Superintendent Jim Negri.

Neither the teacher's identity nor the student's gender, age or grade level have been released to protect the integrity of the investigation as well as the privacy of those involved, Negri said.

"On behalf of the hundreds of hard working and dedicated employees in our school district, please know that this disturbing allegation has my full attention and I will strive to ensure that it is handled swiftly and appropriately and that it is not allowed to cast a shadow on our professionalism and integrity," Negri said in a statement Monday.

District and school officials have turned over information to the Alameda County Sheriff's Office, per district policy, Negri added.

As of Monday afternoon, the Sheriff's Office had not begun an investigation into the allegations, according to sheriff's Sgt. J.D. Nelson.

"There is no open case," Nelson said. "There's not enough information to launch an investigation at this time."

Independent of any law enforcement involvement, the internal investigation will continue until the allegations are definitively resolved, Negri said.

"We place the highest importance on our students' safety and well-being," Negri said. "We always try to expedite our investigation, but we also don't want to rush it. We want to do our homework, our due diligence."

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