A man arrested over the fatal stabbing of a 16-year-old girl on a bus is to be charged with murder, police have said.
Christina Edkins was stabbed on a bus on Hagley Road in Birmingham on Thursday, on her way to school in Halesowen.
Police said they will formally charge Phillip Simelane, 22, in the "near future" following authorisation from the Crown Prosecution Service.
Christina's parents said her death had left them "heartbroken".
In a statement released by police, Kathleen and Jason Edkins said she was "bubbly, beautiful and intelligent".
'Overwhelmed by kindness'
They added: "We are heartbroken by the loss of our beautiful princess, Christina, and it's hard to find words to describe the pain we're all feeling.
"Her family and friends will remember her as an amazing individual with her whole life ahead of her.
"A life that was tragically cut short on that Thursday morning. Our lives will never be the same again."
"We are truly overwhelmed by the kindness that's been shown by friends and neighbours, people who knew Christina well and also those who never got the chance to meet her."
Christina had been studying hard for her exams and was looking forward to her school prom and deciding which college to attend, her parents said.
The family said it had received "fantastic support" and thanked people for their kind words as well as the flowers, balloons and candles left in Christina's memory.
Mr and Mrs Edkins also thanked West Midlands Police officers for their help and support.
They added: "We'd like to thank West Bromwich Albion for their half time tribute at the weekend and to the fans for their heartfelt applause which was very emotional."
Hundreds of flowers and tributes were left outside Leasowes High School in Halesowen, where Christina was a pupil.
Counsellors were brought in to support pupils and staff after the teenager's death.