Three males, including two brothers, have been charged over a brawl organised on Facebook in Sydney's north-west that has left a father and son fighting for their lives.

A group of 20 men were involved in the fight after agreeing to meet outside Rouse Hill shopping centre, on the corner of Caddies Boulevard and White Hart Drive, about 8:30pm Thursday.

The father, 41-year-old Trevor Allen, was stabbed in his stomach, arms and back while his son, 20-year-old Trent Allen, was stabbed in the chest.

Police seized a knife, scissors and a baseball bat from the crime scene.

A short time later, police arrested five men at a house in Whalan.

Three males, aged 15, 18, 20, have been charged with wounding with intent and affray, police said.

Brothers Jyle and Glen Shillingsworth appeared briefly in Mount Druitt Local Court today and were both refused bail.

The court heard they bought knives from a local store before heading to the fight.

A 15-year-old was due to appear in Parramatta Children's Court on the same charges.

Police said they did not know what the fight was over but there had been a long-running dispute between those allegedly involved.

The father and son have both undergone surgery and remain in a critical condition at Westmead Hospital.

ABC/AAP



