A 16-year-old schoolgirl stabbed to death on a bus in Birmingham during the morning rush hour has been named as Christina Edkins.
A 22-year-old man was arrested in connection with the murder of the teenager, a student at Leasowes High School in Halesowen.
He was held near a Morrison's supermarket following a manhunt launched after the killing on a crowded double-decker bus at about 7.30am on Hagley Road as Christina made her way to school.
Police said the man was chased and arrested after being seen acting suspiciously and was being held on suspicion of murder.
Neil Shaw, headteacher of Leasowes High School, said: "Christina was a bright and popular student much loved by staff and students alike.
"We are deeply saddened to hear this tragic news and our thoughts and hearts go out to her family and everyone who knew her."
Detective Superintendent Richard Baker said: "This is a tragic case and the victim's family are devastated. We are still anxious to hear from anyone with information or who may have witnessed the incident this morning to speak to us via the dedicated hotline 0800 096 0095."
The street, leading out of the city, was closed for several hours in the wake of the stabbing.
Emergency services were called to the area at 7.37am after the bus driver raised the alarm and reported that a passenger had been wounded.
But medics were unable to save the teenager. Police dogs and firearms officers were brought in to help search for the knifeman.
Police said the suspect was already on the bus when Christina got on board.
Officers said there was "nothing immediately" to suggest the pair knew each other. They are not looking for anyone else in connection with the murder.