CCTV images have been released after two teenagers were threatened and robbed on a First Bus.
The incident happened on a double-decker on Duke Street at its junction with High Street in Glasgow.
A 16-year-old boy and a girl, 17, were threatened by a man before having items stolen from them.
Officers want to speak to a man in connection with the incident, which happened at 3.20pm on Friday, November 17.
He is 6ft, in his mid to late 20s and has a gaunt appearance.
The man was wearing a green Parka-style jacket with a fur hood, dark jogging trousers and a light beanie hat.
Anyone with information is asked to contact 101.