Security guards have clashed with fans during the Western Sydney Wanderers-Newcastle Jets A-League match in Newcastle yesterday.

Mobile phone footage showed a man being refused access to an area designated for Wanderers fans at Hunter Stadium, before tensions quickly escalated.

In the footage obtained by 9NEWS, a security officer appeared to throw the first punch at the fan, prompting a second man to jump in and drag the guard to the ground.

A larger group of supporters joined the fray, with the fan initially involved restrained by two security guards before being led away.

Police are investigating the incident.

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The Wanderers prevailed over the jets 2-1, courtesy of a late winner by forward Mitch Nicholls.

The match was riddled with controversy, with Newcastle’s first goal coming after scorer Envir Alovodic appeared to be offside in the build-up.