Justin Bieber will not face felony charges in his attempted robbery investigation due to insufficient evidence.

The 20-year-old pop star was accused on snatching a woman's phone at a mini-golf complex in California last month, but prosecutors have decided to reject the case after police found no evidence to support her allegations.

According to a police report, obtained by E! News, nine employees of the park were interviewed and none of them saw the 'Baby' hitmaker grab the victim's phone.

The case has now been referred to the city attorney for misdemeanour consideration.

The woman claimed at the time that Justin demanded to see her phone so he could delete pictures he believed she had taken of him, but when she refused, he grabbed it from her bag.

She began ''wrestling'' with the star for the phone and although he allegedly ''ripped it out of her hands'' he wasn't able to access the pictures because the phone was locked.

Justin then demanded she unlock it and she proved she hadn't taken any photographs, before the star allegedly ''screamed'' at her and upset her 13-year-old daughter.

Justin spoke out on Twitter shortly after the allegations in a bid to defend himself.

He tweeted at the time: ''It is hard to defend myself and my privacy every moment of the day. Then to see rumors. The truth will set u free.(sic)''

He then continued: ''My mom raised me to be kind to others. I get judged, harassed, and I try to take the high road. Sometimes it isn't easy. But we keep trying...

''I will continue to be the man my mother raised. I love people and I will try to be kind even when things are not fair. Don't believe rumors...(sic)''