Officers are appealing for witnesses and information following an aggravated burglary at an address in Bognor.
Police were called over the incident which took place at Shearwater Drive at 7.15pm on February 8.
A victim, a man aged 75, sustained injuries during the incident.
The suspect is described as a white man, 6’5”, wearing a long white puffa-style jacket and had a scarf across his face.
Officers are appealing for witnesses or anyone with information to come forward.
Information can be reported to Sussex Police online or call 101 and quote serial 1068 of 08/02.