By CBSLA Staff

LONG BEACH (CBSLA) – A teacher at a high school in Long Beach has been arrested on allegations he carried on a sexual relationship with a 15-year-old girl.

John William Gunde. (Buena Park PD)

John William Gunde, 46, was arrested last month on charges of unlawful sexual intercourse with a minor, Buena Park police reported Thursday.

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Gunde taught at Juan Rodriguez Cabrillo High School.

According to police, between October and December, Gunde had a sexual relationship with a 15-year-old girl he met on an online messaging platform. Police did not confirm if the victim was a student at the school.

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Buena Park police were informed of the criminal behavior on Dec. 13 and arrested Gunde following an investigation.

According to Juan Rodriguez Cabrillo High’s website, Gunde was listed as a social studies teacher at the school. It’s unclear when he last taught there.

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Investigators are asking anyone with information on the case to call them at 714-562-3901.