Three teenage girls have admitted killing a 75-year-old man in a brutal fatal beating that was filmed on a mobile phone.

Fredi Rivero was near a bus stop in Islington, north London, on February 27, when the teenagers got off a bus and surrounded him.

The girls, aged 15, 16 and 17, pushed, shoved, kicked and punched Mr Rivero, with one of them filming the incident on her phone and grabbing his glasses.

As part of the police investigation, officers recovered CCTV footage of the assault in which the oldest girl was seen to punch the victim in the head causing him to fall backwards.

Police were called at 11.25pm to reports of the disturbance and found Mr Rivero unconscious on the pavement with a severe head injury and in cardiac arrest.

The Bolivian national was taken to the Royal London Hospital where he later died.

On Thursday, the girls, who cannot be identified because of their ages, appeared at the Old Bailey before Judge Judy Khan KC.

The girls, who appeared from custody by video link, pleaded guilty to manslaughter.