Elderly man, child killed on NSW roads

Miranda Forster, Anna Hitchings, Rebekah Ison
AAP

A 10-year-old boy and an elderly man have died in separate NSW road incidents on the same afternoon.

Police say the 10-year-old boy died in hospital after a head-on collision on the Pacific Highway, 32km northeast of Grafton, around 4.20pm on Wednesday.

The driver and other three passengers in the car he had been in were taken to hospital with non-life-threatening injuries.

The driver of the other car suffered leg injuries and is in a stable condition, police say.

The crash happened shortly after a man in his 70s became the victim of a hit-and-run in Sydney's southwest.

Emergency services were called to Clarence Street in Condell Park just before 4pm on following reports a man had been hit.

Police say the man left a family home and was about to get into his parked car when a white van travelling north hit him and continued to drive from the scene.

He died en route to hospital, police say.

The mini-van's front passenger side may have been damaged and police are urging the public to contact them with information.