A 66-year-old woman was violently attacked by two thugs who forced their way into her west London home in the middle of the day.
Police have arrested one man following the “brutal” robbery last month, and on Monday named another they want to speak to.
Scotland Yard has also released images of the suspects, one of whom has distinctive star tattoos on his head.
The victim was at home in Castlebar Park, Ealing, around noon on May 18, when two men reportedly knocked on her door before fleeing when she answered.
A short while later, they knocked again, but this time forced their way into her property when she answered.
One man threw her to the floor and assaulted her, while another searched her home.
They then fled the scene without taking anything.
The woman was taken to hospital, where she was treated for severe bruising and swelling.
Detective Constable Mark Gordon, leading the investigation, said: “This was a brutal attack and one which has understandably left the victim extremely shaken.
“She was lucky not to suffer more serious injuries, but we need to make sure the individuals responsible for this attack are unable to carry out similar offences.
“We are very keen to speak to 36-year-old Pawel Krawczyk and would ask anyone who knows him or recognises these images to get in touch.
“He has a number of distinctive tattoos including stars on the side of his head and there must be people who have recently seen him. Anyone with information on his whereabouts, please contact us immediately on 101/999 on 3771/18May.”
One man has been arrested on suspicion of aggravated burglary in connection with this incident. He has been bailed to return on a date in late August.