Police believe the shooting death at a Sydney wedding reception and the discovery of a man with gunshot wounds in the city's north west on Wednesday are linked to an internal conflict within the Comancheros bikie gang.
A man with links to a bikie gang is in a critical condition after he struggled down a street following a shooting in north-west Sydney today.
Residents in an apartment block near Rider Boulevard in Rhodes said they heard the man, 28, cry out "help" more than 10 times after he was shot four times in the stomach in what police said was a targeted shooting about 4.50am on Wednesday.
Police are trying to confirm whether the man was present at the Serbian Comanchero wedding on Sunday that ended in a bloodbath.
Young gang member Faalau Pisu was shot dead and two other Comancheros were injured.
The acting director of the Organised Crime squad, Detective Acting Chief Superintendent Arthur Katsogiannis, said they were treating the two shootings separately despite the obvious links.
He said it was likely both shootings were a result of internal conflict within the Comancheros rather than rival gangs.
"We are not looking at open gang warfare," he said. "We believe it's a contained conflict."
He said police had "no doubt" there were people that had a specific and detailed knowledge of both shootings but investigators were only receiving "snippets" of information.
"This man is certainly known to police but at this point in time I can't say how," Detective Superintendent Mark Jones of Burwood Local Area Command said of the victim of Wednesday's shooting.
Emergency service officers found the man lying on Rider Boulevard in Rhodes outside a construction site with serious injuries. Police said he was shot in a car park and stumbled 200 metres down Walker Street before collapsing at the corner of Rider Boulevard and Mary Street.
A trail of blood stretched from the corner to Walker Street past the train station.
"I heard three gunshots and I heard a guy calling out for help ... just help, over and over ... at least 10 (times)," one resident said.
Another nearby resident, Ryan Cousins, said he was woken up, probably by the shots, and heard the man screaming "help me, help me, help me!".
Another witness said he heard gunshots "in quick succession" but no screaming or shouting.
The man was treated by paramedics and taken to Westmead Hospital, a NSW Ambulance spokesman said. Police said he was in a critical condition and undergoing surgery in hospital.
Rider Boulevard and Mary Street were blocked by police and motorists were advised to avoid the area. Commuters watched as forensic investigators searched the streets for clues.
Mr Pisu's death was the second targeted killing in Sydney in three weeks.
In mid-October, Yehya Amoud, 27, died after being shot as he sat in a car on Greenacre Road, Greenacre. In August, suspected Lone Wolf associates Roy Yaghi and Jamie Grover were shot dead in a car in South Wentworthville.
Detective Superintendent Jones said investigators had no leads on the Rhodes gunman's identity and urged witnesses to come forward. Anyone with information can phone Crime Stoppers on 1800 333 000.