Police are hunting an old lady with a walking frame who attacked a young woman with a bone disease on a bus - in a dispute over a priority seat.

The victim, 22, who suffers from osteoporosis – a condition which weakens bones – was left with a suspected broken rib after the assault.

She was elbowed “hard in the stomach” by the older woman on a 73 bus in Westminster, police said.

Officers have today released images of a woman they want to speak to over the incident, which happened just after 3.30pm on Thursday, March 12.

A Metropolitan Police spokesman said: “The incident is believed to be due to a dispute over a priority seat.

“The victim, a 22-year-old woman who has osteoporosis, was sitting in the priority seating area at the front of the bus.

“As she got up to leave the bus at Great Titchfield Street, the suspect elbowed her hard in the stomach, causing her to fall back onto the floor.”

The victim was treated in hospital for the suspected rib fracture.

The woman police are hunting was of Mediterranean appearance, aged about 60, with short grey hair, wearing glasses and using a wheeled walking frame.

Anyone with information is asked to contact Westminster Safer Transport team on 020 7321 9666 or Crimestoppers anonymously on 0800 555 111 quoting reference number 174630.