Teenagers charged with murder after man was fatally stabbed in driveway

Emergency services were called to a home in Pemulwuy, in Sydney's west, following reports that a man in his 20s was stabbed multiple times on Driftway Drive at 10.45pm on June 26.

The teenagers, dressed in dark clothing and disguises, allegedly attacked the 21-year-old victim when he and his girlfriend arrived at the home.

READ MORE: Man dies in driveway after killer lands multiple blows before fleeing

The injured man got back in his car and drove a short distance before being "overcome by his injuries", police said.

Paramedics treated the man at the scene, but he was unable to be revived.

"He was stabbed a number of times...this is serious high-level violence that we can't tolerate," NSW Police Detective Superintendent Simon Glasser said after the attack.

Investigators said the victim was known to police, but that he was not a well-known crime figure.

Detectives searched homes in South Penrith, Mt Druitt, and Woodcroft on the morning of July 3, and two teenagers were arrested.

In South Penrith, police arrested a 17-year-old boy. He was taken to Penrith Police Station, where he was charged with murder and failing to comply with a digital evidence access order direction.

He was refused bail to appear in a children's court on July 4.

A 16-year-old boy was arrested in Mt Druitt. He was taken to Mt Druitt Police Station, where he was charged with murder. He was also refused bail to appear in a children's court on July 4.

Police seized a car, believed to be used in a getaway, from the Woodcroft home.

Investigations under Strike Force Hickety are continuing, police said.