A 48-year-old woman was punched in the face after confronting three youths who were attempting to steal a set of keys from the door of a house.
The victim was approached by the teenagers after she saw them attempting to steal the keys.
When she asked the group to hand the keys over, they ran past her – and one punched her in the face.
They then threw the keys on the ground.
The incident happened in Harborough Road, Oadby, at about 5.40pm on Wednesday, December 19.
The youths ran across the A6 and into Queen Street as they made their escape.
Police released details of the incident and appealed for witnesses earlier this week.
Pc Marina Waka said: "Harborough Road can get very busy and the victim said there was a lot of traffic in the area at the time.
"If you travel along that road, on your way home from work perhaps, please think back.
"Can you remember seeing the group of young men in the street? Did you see one of them hit the woman?
"Do you think you know who they are or did you see where they were going?
"If so, please call us and help us locate the suspects."
The suspects are all white, aged about 17, of average build and about 5ft 8in.
They were all wearing hooded tops and dark blue jeans.
Anyone with any information about the incident is asked to contact Pc Waka on 101.
