LOS ANGELES (CBSLA.com) — Los Angeles County prosecutors filed a motion Tuesday suggesting singer Chris Brown violated probation for failing to complete court-ordered community labor.

The motion also advises that Brown may have threatened to shoot singer Frank Ocean, whose real name is Christopher Breaux, during a fight outside a West Hollywood recording studio on Jan. 27.

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“A preliminary investigation by the Los Angeles County Sheriff’s Department revealed that when leaving a recording studio with several friends, the Defendant extended his hand to shake hands with another musician, Mr. C. Breaux,” according to the Los Angeles County District Attorney’s Office.

“Mr. Breaux refused to shake hands with the Defendant and informed Defendant Brown that his car was parked in Mr. Breaux’s assigned parking space. The Defendant punched Mr. Breaux on the side of his face. Two of the Defendant’s friends also began to punch Breaux. After two or three minutes, they stopped punching Mr. Breaux and Defendant Brown said ‘[W]e can bust on you too!’ ‘Bust’ is a slang term on the street to mean shoot.”

The 19-page document says Brown also failed to provide “credible, competent or verifiable evidence” that he completed the required 180 days of community labor.

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The court had allowed the singer to complete the service in his home state of Virginia.

“In a motion filed by Deputy District Attorney Mary Murray, the court was asked to decline to accept Brown’s community labor in Virginia due to what appears to be ‘significant discrepancies indicating at best sloppy documentation and at worst fraudulent reporting,'” the Los Angeles County District Attorney’s Office said in a statement.

Prosecutors are asking the court to require Brown to complete all of his hours in Los Angeles County under the supervision of the probation department.

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Brown, who has been on probation since June 2009, was ordered to complete the labor as a part of a five-year probationary sentence after he pleaded no contest to assaulting his ex-girlfriend, singer Rihanna.