A 20-year-old woman charged with murdering 17-year-old Jacob Cummins and attempting to kill four others after a car hit the teenagers, sobbed in court as the charges were read out.

Jacob Cummins, 17, was among a group of teenagers hit by a car on Eucalyptus Boulevard in Canning Vale on Thursday afternoon.

The incident happened after rival groups of teenagers were involved in a street fight in various locations in Canning Vale.

Jacob Cummins was killed when a car hit him and four other people at a bus stop in Canning Vale. ( Supplied: Facebook )

Two youths were stabbed during the fight, but neither received fatal injuries.

A short time later a car hit a group of teenage boys aged between 16 and 17, who were waiting at a bus stop on Eucalyptus Boulevard.

Aya Hishmeh appeared in court charged with Jacob Cummins' murder as well as four counts of attempting to kill.

Ms Hishmeh sobbed in court when the Magistrate asked her if she understood the charges.

Her family was in court and her father shouted, "We love you bubba, we all love you" while she was led away.

A red car that allegedly ploughed into pedestrians in Eucalyptus Boulevard in Canning Vale, killing one. ( ABC News: Andrew O'Connor )

Ms Hishmeh was remanded in custody and will appear in court again in January.

A vigil for the teenager has been held at Scarborough Beach.

About 50 people, including Mr Cummins' mother, gathered on the steps of an amphitheatre to pay tribute.

Acting Inspector Dean Snashall from the State Control Centre was one of five police officers who attended.

"Our presence here as police officers is merely as a community engagement exercise," Inspector Snashall said.

"Many people don't realise that police have a responsibility in the community engagement sphere.

"We're here today to connect with the family and the friends to offer our condolences and support and obviously it would be remiss of us not to come down here and meet with and make sure that going forward there's no further altercations."