American website TMZ claims that Justin, 20, has been accused of reaching into a woman's handbag and removing her phone after believing she took pictures of him with the device.
The woman was the one who apparently accused him of attempted robbery.
It's alleged the incident unravelled on Monday evening when Justin and his entourage thought she was going to take pictures of them while they played mini golf in LA.
The unnamed woman alleged that Justin reached into her bag to get the phone to check she hadn't taken pictures. As it was locked, she says he handed it back and she then unlocked it to show there were no photos.
The woman then filed a complaint.
An LAPD spokesperson confirmed the report, telling BBC News: "As of right now, no arrest has been made and detectives are currently interviewing the victim."
A rep for Bieber has yet to comment.
The investigation comes after Justin was seen enjoying a day of horseback riding with friends in Los Angeles. The previous day he treated his mum Patti Mallette to a basketball game for Mother's Day.
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