Police are investigating after a man was bashed by four security guards outside the Swinging Pig in Rockingham.

Four security guards have been recorded bashing a man outside a Rockingham pub.

Footage obtained by 7NEWS shows the guards throwing the man to the ground before throwing several punches outside the Swinging Pig Bar.

A witness has told 7NEWS the man in his 30s was left with a swollen right eye and lacerations to his head.

A spokesman for the pub said police were investigating.

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