A man shot in the leg in broad daylight at a popular motorcycle event in Sydney's west is believed to have been involved in an altercation with members of a bikie gang.
Police have been told five men wearing outlaw motorcycle gang colours approached the 33-year-old man on Clyde Street, Silverwater, at about 2.50pm (AEDT) on Saturday.
He was shot in the leg before the men ran from the scene and crossed a park towards Silverwater Bridge.
The victim was taken to Liverpool Hospital where he was reported to be in a serious condition.
The incident happened as hundreds of people gathered at an event nearby run by a Christian motor cycle club.
The organiser of The Silverwater Street and Custom Motorcycle Show, Greg Hirst, told AAP few people at the event were aware of what had happened.
"We were running the show at the time.
"There was an incident here over in the bushes behind the show.
"I got called over. There were paramedics in attendance and an ambulance."
Mr Hirst said the motorcycle show did not normally attract trouble.
"We've never had an incident in 15 years," he said.
"It's a family show."
Saturday's shooting follows an explosion outside the Hells Angels clubhouse on Crystal Street in the inner west suburb of Petersham early on Wednesday morning.
Police are calling on anyone who witnessed the incident, or who has any additional information, to contact Crime Stoppers on 1800 333 000.