A woman had her mobile phone stolen during a robbery in Victoria Promenade, Northampton.
A 42-year-old woman was walking towards the St Johns Car Park, about 20 yards from the Bedford Road junction, when she was approached from behind by a boy on a black BMX bike.
She was about to make a call on her mobile phone, but the offender snatched it from her and cycled off on his bike, accompanied by a second boy who was about the same age and height.
The main offender is described as white, aged 16, 5ft 8in, with a medium build and short spiky light-brown hair. He was wearing a grey hoodie.
The incident happened between 5.15pm and 5.35pm on Tuesday April 29.
Witnesses to this incident, or anyone with information, should call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.