The incident took place at Nobu restaurant in Mayfair, London on Tuesday night (August 2), where Timberlake dined with his "Friends with Benefits" co-star Mila Kunis and some friends.
Following the melee, the photographer called the police but the bodyguard had already left the scene. He was later arrested at The Dorchester Hotel, where he is staying.
"Police were called to Berkeley Square at approximately 9.45pm last night,” says a Scotland Yard spokesperson. “A man alleged he was assaulted. He suffered minor injuries. He did not require hospital treatment."
They also added: "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. Inquiries are ongoing."