A TEENAGE girl was punched in the head during a terrifying robbery in High Wycombe on Tuesday morning.

The 15-year-old was walking home on Underwood Road around 7.50am when the culprit approached her from behind and punched her on the side of the head.

Her white iPhone 5s was then grabbed before the attacker fled.

The offender described as of medium build and was wearing a blue Adidas zip up jacket, with the hood up and grey jogging bottoms and trainers.

Anyone with information should contact PC Kimberly Barletta from High Wycombe police station via the Thames Valley Police Enquiry Centre on 101.