Two teens, just 14 and 18, were arrested after allegedly threatening a driver with a knife in northern suburbs robbery

Two teens, one just 14, have been arrested after allegedly threatening a rideshare driver with a knife before trying to steal his car and making off with cash.

Both teens were refused bail and will appear in the Elizabeth Magistrates Court and Youth Court on Wednesday.

A rideshare driver has been injured and two teens, aged just 14 and 18, have been arrested after allegedly threatening a driver with a knife before making off with cash.

Police were called to Mofflin Rd, Elizabeth Grove about 2.15am on Wednesday after reports that a rideshare driver had been confronted by two males.

It is alleged the suspects entered the Toyota hatchback and threatened the driver with a knife before trying to steal his car.

The victim tried to flee from his attackers before handing over cash to the duo who fled on foot.

The victim, a 39-year-old man, received a cut to his hand during the altercation and was treated at the scene by paramedics.

Police soon found and arrested the two suspects at a nearby address and an 18-year-old man from Blakeview and 14-year-old boy from Vista were charged with aggravated robbery.

The 14-year-old boy was also charged with stating false details to police.

Both teens were refused bail and will appear in the Elizabeth Magistrates Court and Youth Court on Wednesday.