The sister of a 12-year-old girl killed in a hit-and-run crash in Greater Manchester has spoken of the aftermath of the crash.

Helina Kotlarova, 12, was killed by the driver in Oldham on New Year's Eve with her cousin Zaneta Krokova, 11, critically ill in hospital.

Helina's sister Sylva, 19, said her sister had just gone to the shops when she was killed.