A 13-year-old boy who went missing in Edinburgh has died hours after being found unwell on a bus.

Blake Ross went missing from Howdenhall in the city on Saturday afternoon and was without the medication he needed.

On Monday afternoon, Police Scotland announced the teenager had been traced but it was revealed he died on Monday night.

He was discovered unwell on a number four Lothian Bus at around 4pm on Monday.

Blake was known to live with an underlying health condition, understood to be diabetes, and was taken to the Royal Hospital for Sick Children in Edinburgh, where he died at around 9pm that evening.

It is understood he had been reported missing from a support unit for children in care.

His death is currently being treated as unexplained and inquiries are continuing.

Superintendent Lesley Clark, of Edinburgh Division, said: "This is a tragic death of a young boy and our thoughts are with Blake's family at this very difficult time.

"In the coming days and weeks we will be working with our relevant partners to support his loved ones and provide them with all the necessary support and assistance they require.

"In addition, we will be continuing to conduct our investigation to establish the full circumstances surrounding Blake's death and submit our findings to the procurator fiscal."

The police also confirmed the case had been referred to the Police Investigations and Review Commissioner.

A spokesman for the watchdog said: "A report on the commissioner's findings will be submitted to the Crown Office in due course."

Anyone with information relating to the teenager's last known movements are asked to contact the police on 101.