A Twitter user claiming to be the person who stole a camera and laptop from Justin Bieber has posted video footage of the star online.

As previously reported, Bieber was a victim of theft on Tuesday (October 9) in Washington, with his tour manager also falling foul to the thief.

A naked photo purporting to be the Canadian later appeared online but it seems to have been deemed a fake.

However, a Twitter user called 'gexwy' is now claiming to be the thief - and they have uploaded two videos of the singer, including one of Bieber pranking a crew member.

They have also threatened to post more videos today (October 12), with Bieber personally replying:

"No matter what you have and what you post tomorrow i know my fans wont leave me. screw it. #toostrong."

Gexwy replied: "Haha. that is what u think. we will see tomorrow at NOON. last chance. and the rest of u can just shutup. u have no idea what i have and when u see tomorrow u will feel different."