A popular Northern California golf coach has been charged with child molestation after allegedly sexually assaulting multiple boys during a three-year period, authorities said.

Andrew Michael Nisbet, of Livermore, did not enter a plea on Tuesday in Alameda County Superior Court after he was charged with 65 felonies, including lewd acts with a child and oral copulation of a child. the Associated Press reported.

Nisbet was arrested Saturday while he was working at the Las Positas Golf Course in Livermore, the AP reported. The arrest came a day before he was to receive the PGA's Northern California Section 2013 Junior Golf Leader Award for his work with young golfers, said Officer Steve Goard of the Livermore Police Department.

The charges against Nisbet mostly stem from allegedly sexually assaulting two boys between the ages of 12 and 17 from 2009 to 2012, Goard said.

During an interview with investigators shortly after his arrest, Nisbet admitted to some of the lewd acts on his students, Goard said.

Nisbet's attorney, Timothy Rien of Livermore, did not immediately return a call for comment on Wednesday.

Since Nisbet's arrest, investigators have discovered a third victim and possibly a fourth, Goard said.

Nisbet, 31, was being held in jail Tuesday without bail and was no longer employed at the Livermore municipal golf course, where he had worked since 2006, police told the Contra Costa Times.

He is due back in court Jan. 15, Alameda County Assistant Dist. Atty. Teresa Drenick said Wednesday.

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