A 32-year-old man has been arrested on suspicion of causing the death by dangerous driving of a 14-year-old girl who died after a hit-and-run collision.
Witnesses said Jasmyn Chan pushed her 12-year-old-friend out of the way of a small, dark car before she was fatally injured on Friday evening as she crossed Normanton Hill, near to Richmond Park, Sheffield.
Yesterday her parents appealed for the driver of the car to come forward at an emotional news conference.
Today, South Yorkshire Police said: "A 32-year-old Sheffield man has been arrested in connection with the death of 14-year-old Jasmyn Chan.
"The man, who was arrested overnight on suspicion of causing death by dangerous driving, remains in police custody today.
"Jasmyn sustained fatal injuries following a collision in Normanton Hill at around 9.20pm on Friday 9 May. Inquiries continue."
Jasmyn was with a group of friends returning from Richmond Park when they crossed Normanton Hill, which is a 30mph road.
Witnesses said three of the youngsters made it across the road but Jasmyn and the 12-year-old were struck by the vehicle.
Yesterday, Jasmyn's father Peter Chan said his daughter had recently cut her hair short to donate it to a charity which makes wigs for young cancer patients.
Mr Chan said: " My daughter was beautiful, inside and out.
"I cannot put into words the pain and devastation I feel in my heart knowing she is gone.
"As a family we are heartbroken and I don't know how we will ever get over losing Jasmyn. Please if you know something, please come forward.
He said: "Jasmyn was a loving, friendly girl who was very giving.
"She only recently had her hair cut short to donate it to a charity that make and provide wigs to children who have lost their own hair through cancer.
"That's just the kind of girl she was and I am filled with absolute sadness I will never again see her sweet, smiling face."
Jasmyn's mother Paula McCullie wept throughout the press conference and clutched a grey hoodie her daughter had recently bought.
The 12-year-old girl was also injured but has been released from hospital and is recovering.
Chief Inspector Stuart Walne, investigating, said people who knew Jasmyn believed that pushing her friend to safety was a "typical thing she might do".
He said: "We have had a fantastic response from the public and I have a number of officers working on leads from the information that has been given to us."