A 15-year-old girl has died after she was stabbed during the rush hour in south London.

Footage posted on social media showed several police cars and ambulance vehicles near a bus in Croydon on Wednesday morning.

A boy who knows the victim has been arrested, the Metropolitan Police said.

Chief Superintendent Andy Brittain said: “Our immediate thoughts are with this young girl’s family who are facing the most tragic of news. Our officers are with the girl’s family to support them.

“I am in contact with the local community, who are clearly as concerned as we are about this tragic incident. I shall continue to update them throughout the day.”

Emergency services were called to Wellesley Road in Croydon at around 8.30am to reports that the girl had been stabbed.

Both the land and air ambulance attended but she was pronounced dead at the scene 50 minutes later.

Around an hour and 15 minutes after the stabbing police arrested a teenage boy in connection with the girl’s death.

Mr Brittain added: “My officers were immediately on scene to provide first aid and support paramedics.

“Acting on information provided to them, officers also worked closely with colleagues from across the Met and the British Transport Police to track a teenager in connection with the stabbing.

“I can confirm that an arrest was made at about 9.45am in the Croydon area. At this early stage we believe that he may have known her.

“A crime scene will be in place for some time, and I am grateful for the co-operation of residents.”

A spokesman for London ambulance service confirmed that three ambulance crews, an incident response officer, an advanced paramedic in a car as well as the air ambulance were sent to the scene.

Witnesses or anyone with information can contact police on 101 quoting reference CAD 1601/27Sep, to remain anonymous contact Crimestoppers on 0800 555111 or online.