A knifeman threatened two men before stealing their mobile phones in a Portsmouth park.
The victims, both aged 22, were sitting on a bench in Victoria Park when they were approached by a man who asked them for directions, which they provided.
But he then brandished a knife and demanded they hand over cash and their mobile phones.
Police say the man made off with their belongings via the park entrance at the junction of Anglesea Road and Edinburgh Road.
The suspect is described as being white, around 5 ft 8 ins to 5 ft 10 ins tall, of skinny build with a thin or drawn clean shaven face. He spoke in broken English with an Eastern European accent, was aged in his late 20s or early 30s and was wearing a hooded Puffa jacket, a Beanie hat, and blue jeans.
Police today revealed details of the robbery, which happened between 2pm and 2.30pm on Good Friday
Witnesses or anyone with information should contact CID at Fratton Police Station by phoning 101.
Mini-com users can phone 01962 875000.
Information can also be given anonymously by phoning the independent Crimestoppers charity on 0800 555 111.