Justin Timberlake's pals have called the paparazzo his bodyguard has been accused of assaulting a "lying piece of s**t".

The 'Friends with Benefits' actor was joining his co-star Mila Kunis - who he is said to be dating - at London's exclusive Nobu restaurant on Tuesday night (02.08.11) when a smartly-dressed man, believed to be his security assistant, was reportedly seen punching a photographer to the floor although a close friend of Justin claims this is completely untrue.

He told E! News: "[Justin's bodyguard] did not touch that photographer."He was a lying piece of s**t photographer who fell down.

"[The bodyguard was arrested because] that's how it is [in the U.K.]; to be arrested is to be questioned. And after questioning him, the police determined that the bodyguard did not touch the photographer and he was released with no charges."

A spokesperson for Scotland Yard said yesterday (03.08.11): "Police were called to Berkeley Square at approximately 9.45 Tuesday night. A man alleged he was assaulted.

"He suffered minor injuries. He did not require hospital treatment. Officers later arrested a 45-year-old man at a central London hotel on suspicion of Common assault. He is being held at a central London police station. Enquiries are on-going."