Police in Virginia say singer Chris Brown will remove graffiti, pick up trash and wash cars as part of his sentence for beating ex-girlfriend Rihanna.

The 20-year-old R&B singer was sentenced in California last month to five years' probation, six months of community service and a year of domestic violence counselling for the attack.

He is doing the work in Richmond, Virginia, near his home.

Sky news reports that in a letter to the judge, Richmond Police Chief Bryan Norwood outlined some of Brown's tasks.

They include graffiti removal, rubbish removal, washing cars, cleaning and maintaining grounds.

Chief Norwood released the following statement with regard to the letter: "The letter speaks for itself. We will not be offering further details regarding his work responsibilities."

He will be supervised during his service, but Brown would have to pay for any additional security if the public becomes aware of his presence.