Man stabs his brother while driving in Sydney's west

Police are looking for a man who allegedly stabbed his brother in the arm while the pair were driving through Sydney's west.

Police say the victim was driving his older brother through Bankstown at about 11:15pm Sunday when they began arguing. The passenger allegedly stabbed his brother in the arm with a knife while he was still driving and then slashed three of the car's tyres after they had stopped.

The 34-year-old ran off along Stacey Street and his 31-year-old brother managed to drive to a shopping centre, from where he called police.