Oakland Police Department under investigation for underage sex scandal

Several Oakland, California, police officers are under investigation over allegations of sexual misconduct involving an underage girl.

Three officers are on administrative leave as a result of the accusations. The investigation reportedly began after details regarding the relationships were discovered in a suicide note left by an Oakland police officer last year, sources told local media.

SEE ALSO: Price of gun Zimmerman used to kill Trayvon Martin skyrockets

KPIX reports several officers eventually said they lied about their relationship with the girl and that one officer admitted to knowing she was underage at the time.

Sources have told news outlets the girl at the center of the scandal is believed to be the daughter of a civilian employee of the police department.

In addition to the department's internal investigation, a criminal investigation has been opened.

See more of the biggest news scandals of 2015: