A Sydney teenager's death in a moped crash has triggered an outpouring of grief among his devastated friends.
The 13-year-old died overnight after his moped slammed into the back of a parked truck at an industrial estate in Sydney's west.
The boy, who was not wearing a helmet, suffered traumatic head injuries and was unconscious when emergency services arrived at the scene in Erskine Park.
He died on the road just after 3am on Tuesday.
Two teenagers who were with the boy have been rocked by his death and the local community is in mourning, police say.
A 16-year-old, reportedly the boy's brother, stayed at the crash scene while a second boy, 17, ran to get help from a security guard who called triple-zero.
Chief Inspector Tracy Stone said everyone touched by the boy's death was significantly upset.
"It is very tragic not only for the family but the greater community," Chief Insp Stone told reporters on Tuesday.
"I know that it's impacted that child's school and they're dealing with the situation at this point in time."
Friends of the 13-year-old have turned to social media as news spread of the boy's death.
"I can't believe your (sic) gone, we're all think of you, flight (sic) high beautiful," one girl wrote on Facebook.
"See you on the other side man, you will be missed, lots of love," posted one boy.
"rip gone but never forgotten," another friend said.
A local truck driver told AAP the Tyrone Place industrial site is a popular area for burnouts.
The dead-end street, which is used by many truck drivers as a rest area, is marked with many rubber skid marks.
Chief Insp Stone said she hoped young boys would think carefully before engaging in risk-taking behaviour.
