The 71-year-old Ex California governor was interacting with fans during a skipping competition at his Arnold Classic Africa sporting event when a man drop-kicked him from the backside. The attacker is seen being restrained following the incident.

Video footage has shown how the Hollywood star Arnold Schwarzenegger being attacked at an event in South Africa. Schwarzenegger thanked fans on Twitter for their concern, but insisted there was "nothing to worry about".

The video footage, shared widely on social media, shows Schwarzenegger posing for photos and filming at the Johannesburg event on Saturday when the man attacks him with a flying kick.

The Terminator star stumbles forward after the kick, while the attacker falls to the ground, where he is immediately restrained by a security guard.

The man was later handed over to police officers, event officials said.

Schwarzenegger tweeted to his more than four million followers: "I thought I was just jostled by the crowd, which happens a lot. I only realised I was kicked when I saw the video like all of you."