The death of a schoolgirl hit by a truck while crossing a road in Melbourne has had a "profound impact" on students and staff at her school.
The 14-year-old, named by media outlets as Aivy Nguyen, died in hospital on Wednesday, hours after she was struck on Whitehorse Road in Ringwood about 7am when the driver did not stop.
A 39-year-old NSW man contacted police shortly afterwards and has been speaking with officers.
Mount Alexander College principal Wayne Haworth said the school was deeply saddened by the tragic loss of a "beautiful young student".
"Our thoughts are with Aivy's family and friends at this very difficult time," Mr Haworth said in a statement on Thursday.
"This news has had a profound impact on many students and staff, and I know that our community will band together and support each other throughout this time."
Despite only being at the school less than a year, Aivy's personality and friendliness meant she made strong connections, Mr Haworth said.
"She made an impact at the school, she was a great student and she had a passion for learning," he said.
"We will be doing everything we can to support those who need it during this difficult time."
Teachers and counsellors were available to talk with students needing extra support, he said.
Family and friends paid tribute to the teen on Wednesday night as they gathered at the scene, leaving flowers and cards.
The teen's cousin, Kimberley Nguyen, told News Corp Australia that Aivy would always look after her younger sister, aged 10.
"They were joined at the hip. She was smart and innocent. She was adorable," she said on Wednesday.
The truck driver involved in the incident was an employee of Makita and was delivering tools to a TAFE in Malvern East, according to the Nine Network.
"The company is deeply saddened by today's accident and our thoughts are with the family and friends of the young girl who lost her life," managing director Shigeru Okada told Nine.
"Our driver is assisting police and the company will co-operate in any way we can."