A thief wearing a balaclava and a hooded top mugged a man as he walked along a Northampton street on Tuesday evening.
The 29-year-old victim was walking along Rillwood Court in Lumbertubs sometime between 10pm and 10.30pm on Tuesday when a man approached him from behind.
He demanded the man hand over items and searched his pockets, taking a black HTC Desire S mobile phone.
The mugger was a slim young man, aged between 16 and 20 and about 5ft 9ins.
He was wearing a balaclava, a black hooded top, black trousers and trainers and black woollen gloves.
He also had a bag with a red strap.