A thief snatched a handbag from a woman in broad daylight with such force that she fell to the ground.
The victim, aged 69, was walking along Bramber Lane close to Coldstream House at about 1.15pm on Monday February 10 when a man approached her from behind and pulled her handbag from her.
Sussex Police said the woman suffered cuts and bruises as a result.
The thief, described as a young man in dark clothing, escaped towards the Crouch Gardens.
Police are keen to speak to anyone who was in the area at the time, especially if they saw anyone suspicious then or in the minutes beforehand.
The tan coloured bag has been recovered but some items are still missing.
Sergeant Stuart Mullins said: “This was a nasty incident and is being treated as a robbery.
“Offences of this sort are rare in Seaford and we are very keen to find the person responsible.
“Until then I would urge the public to be wary of walking along alleyways or secluded routes on their own.
“We are also asking that anyone with any information come forward especially if you think you might have seen the attacker or know who it is.”
Anyone with information should call 101 quoting serial 629 of 10/2, email firstname.lastname@example.org or call the independent charity Crimestoppers anonymously on 0800 555111.