Detectives are appealing for witnesses after two seperate robberies in Huddersfield
The first happened on Friday on Balmoral Avenue in Crosland Moor.
The male victim was walking along the road, talking on his mobile phone, when he was approached by a man from the opposite side of the road.
The man tapped the victim on the shoulder and when the victim turned round, he demanded he empty his pockets and produced a knife.
The man handed over his mobile phone and the suspect made off on foot.
He is described as a white man, aged about 18 to 19 years old, 6ft 1ins tall and thin.
He had a spotty complexion and was wearing grey tracksuit bottoms and a navy blue hooded top with the hood pulled up over his face.
The second robbery happened on Saturday at around 9pm on Royds Avenue at New Mill.
The victim and his friend were walking home when they were approached by two men near Royds Avenue.
One of the men grabbed hold of the victim and tried to get hold of the his friend but he was able to get away.
The men then demanded the victim empty his pockets and made threats. The victim handed over a mobile phone one of the men while the second stood behind him.
He was then told to turn around and walk away in the opposite direction while both suspects made off on foot in an unknown direction.
The first man is described as white, in his late teens, 5ft 11ins tall and wearing a black scarf over his lower face and a cream/sandy jacket with pockets on the front.
The other is described as white, 5ft 11ins tall and skinny. He was wearing dark clothing and had a black scarf over his face.
Anyone with any information about either of the robberies is asked to contact Detective Constable Peter Usher at Huddersfield CID on 101 or via Crimestoppers, anonymously, on 0800 555111.