Family members of Notorious may have been targeted in one of two drive-by shootings in Sydney's west.

Family members of Notorious may have been targeted in one of two drive-by shootings in Sydney's west. An elderly couple, believed to be closely related to Notorious's sergeant-at-arms, were asleep when several bullets tore through the front of their home in Doonside about midnight, narrowly missing the pair.Minutes later several bullets were fired into the front of a house at nearby Prospect. Six people, including a 15-year-old and a four-month-old, were inside but escaped injury.Police said the homes might have been targeted because of the occupants' links to Notorious. "We believe there may be links between the two locations and … the Notorious criminal group," said the commander of the Gangs Squad, Detective Superintendent Mal Lanyon, mother of Notorious's sergeant-at-arms is the owner of the Doonside home.The attacks may be retaliation for a drive-by shooting at the house of a senior member of the Bandidos Motorcycle Club's Blacktown chapter early on Monday. Notorious is suspected of being behind that shooting, as well as attacks on the Nomads' clubhouse in Marrickville and the Hells Angels' clubhouse in Petersham in recent months.

Notorious, thought to have been formed in 2007, is run by a Lebanese-Australian Christian with longstanding links to one of Sydney's most well-known underworld families. Police and underworld sources have indicated that Notorious is relying heavily on "Islander muscle" and has opened a clubhouse in Kings Cross - an area traditionally treated as neutral by the older clubs.

"Since Notorious have been around things have been getting hotter and hotter," an underworld source told the Herald.