A 24-year-old Hong Kong kickboxer was seriously injured after a gang of five people slashed his legs in Kowloon on Friday night.

The victim, Wong Hong-tat, was in his car parked on Cameron Road in Tsim Sha Shui at 9.20pm when five men, who were carrying hammers and knives, approached and opened the car door, Sing Tao Daily reported.

Wong was dragged out of the car and attacked his legs. The gang then got into a seven-seater vehicle and escaped.

Wong, who suffered serious leg injuries, fell to the ground with blood pouring from his legs.

Passers-by called the police and he was sent to Queen Elizabeth Hospital for medical treatment.

It was understood that Wong represented Hong Kong at the East Asian Muay Thai Championships last year.

After an initial investigation, police believe the attack was related to a triad dispute and another knife attack that happened in Sham Shui Po in February.

Police arrested three suspects aged from 21 to 23 in Tsim Sha Tsui on Saturday. The anti-triad squad is following up on the case.