A student who admitted mowing down a young runner while drunk at the wheel and then fleeing the scene has been found dead in prison.

Katie Allan, who was 20 at the time of the accident, died at Polmont Prison, near Falkirk, on Monday.

The Glasgow University geography student had been jailed for 16 months in March this year.

She had admitted causing serious injury to the teenager by driving dangerously and getting behind the wheel while she was more than four times above the legal alcohol limit.

The incident, which involved a 15-year-old boy, took place in Giffnock, East Renfrewshire, on August 10 last year.

Paisley Sheriff Court heard that the teenager was out jogging at about 9pm when he was struck by a Ford Fiesta.

The impact was so severe that the car's bumper was torn off as the car sped away.

The victim was left unconscious, with blood seeping from a head wound.

He had been preparing to sit his Higher examinations but suffered a broken ankle and a fractured eye socket.

Allan, who was due to be released in October, was quickly traced as eyewitnesses made a note of her registration plate.

Sheriff David Pender told Allan, from Glasgow, there was only one appropriate sentence.

He added: "You were very much under the influence of alcohol. It should have been obvious to you that you were not in a condition to drive.

"In my view, the combination of the two charges makes it impossible to deal with this in a non-custodial way."

A spokeswoman for the Scottish Prison Service said: "We can confirm Katie Allan passed away at Polmont."

A Fatal Accident Inquiry is expected to be held.