A teenager has been charged with the murder of a 12-year-old girl in Liverpool city centre.
va White had been in the city with friends on Thursday following a Christmas lights switch-on when she suffered â€œcatastrophic injuriesâ€ in an assault at 8.39pm, Merseyside Police said.
A 14-year-old boy, who cannot be named for legal reasons, has been charged with murder and possession of a bladed article.
Police said he has been remanded in custody to appear in court on Monday.
Three other boys aged between 13 and 15, who were also arrested, have been conditionally bailed as inquiries continue.
Ava, who has been described as â€œpopularâ€ and â€œbrightâ€, was involved in a â€œverbal argumentâ€ which escalated into an â€œassault on her with a knifeâ€, police said.
The force said the offenders ran off up School Lane, across Hanover Street and into Fleet Street after the incident took place.
Ava was taken to Alder Hey Childrenâ€™s Hospital after paramedics arrived but died a short time later.
On Friday, flowers were being laid on Church Street in tribute to the Notre Dame Catholic College pupil, as forensics officers and police searched the scene.
A balloon was left by 17-year-old Lacey, who did not want to give her surname, who said her younger sister had been close friends with Ava.
She said: â€œShe was just a bubbly character, so loving and caring.
â€œShe came out with her friends to enjoy herself and I think itâ€™s just wrong that this has happened.â€
Headteacher Peter Duffy said: â€œShe was an incredibly popular girl with a fantastic group of friends.â€
Assistant Chief Constable Ngaire Waine said the incident was â€œsad for the cityâ€ but â€œeven sadderâ€ for Avaâ€™s family.
On Saturday, police issued an image of a van which may have been occupied by key witnesses to the killing.
Detective Superintendent Sue Coombs said: â€œWeâ€™re continuing to support Avaâ€™s family and they have requested that their privacy continues to be respected at this difficult time.
â€œItâ€™s also vitally important as we continue the investigation that nobody posts comments or names on social media which could potentially impact upon us getting justice for Avaâ€™s family.
â€œPlease trust us that we are doing all we can to investigate and update people on this tragic incident, and we do not want anything to jeopardise this.â€
Ms Coombs urged anyone who captured the incident or aftermath to send images or footage to the force online at https://mipp.police.uk/operation/05MP21M43-PO1.