Sussex Police is appealing for witnesses after an attack on an elderly woman in London Road, Brighton this week.
Police said: “At about 4.30pm on Wednesday (March 27) the 89-year-old woman was walking south down London Road, Brighton.
“As she passed the Co-op supermarket she was approached by a woman who had previously been sitting on the floor against a bus stop, covered by a light coloured blanket.
“There was a physical contact between them, in which the victim was knocked or pulled to the pavement where she was left by the suspect who walked away north.
“The victim sustained some bruising although she was not seriously injured, but has been left very shaken by the incident. She was dressed in a red coat and carrying a large red shoulder bag.
“Nothing was stolen.”
Detective Sergeant Chris Lane said: “This is a busy street and there were many people around at the time, who are likely to have seen what happened.
“We ask them to contact us as soon as possible either online or by calling 101, quoting serial 862 of 27/03.”
Police said a women had been arrested in connection with the incident.