A five-year-old boy was injured when he tried to stop a robber who had snatched his mother's gold necklace. The boy was pushed to the ground when he and his mother struggled with the attacker, who targeted them in the Humberstone area of Leicester. The man approached the 28-year-old woman from behind and grabbed the chain from her neck. The attack happened in Tennis Court Drive between 1.30pm and 2pm on Friday, May 31. Police released details and appealed for witnesses yesterday. The robber ran off toward nearby Pine Tree Avenue. Detective Constable Louise Osborne is investigating the incident, she said: "This was a frightening incident for the victim and her son, the offender had no regard for the affect the incident would have on them and we need the public's help to catch him. "We've carried out a number of inquiries locally in a bid to identify potential witnesses. "If you were in this area and remember seeing a man similar to the suspect or you witnessed any part of the incident then we would urge you to contact us. "The necklace was broken during the incident and we would like to speak to anyone who has been approached by someone selling a similar item of jewellery. "Any calls received will be treated in confidence." The attacker is black, in his early 20s, approximately 5ft 7ins and of skinny build. He had a small moustache and short black hair. Police said the stolen chain was made of 22 carat gold and had a gold flower at its base. The flower had a diamante stone at its centre with two further chains hanging from it. Contact Det Con Osborne on 101 or Crimestoppers, which is anonymous, on 0800 555 111.