Officers were called to a house in Ersham Road in the early hours of Saturday morning (7 October).
Four people had broken in and demanded money from the occupant. The victim, a man in his 80s, was threatened and forced to hand over cash. He was hit on the head and treated in hospital.
Following in extensive search of the area, no suspects have yet been identified.
Anyone who saw what happened or may have doorbell, CCTV, or dash cam footage from the area are asked to get in touch. Information can be reported online or by calling 101 quoting serial 37 of 07/10.
Flooding forces Eastbourne roller-skating rink to close
£50,000 fundraising goal set for 'significant' Arlington Stadium repairs
Hailsham main road to remain closed for further five weeks as works move to second phase
Eastbourne MP to meet with new South East Water CEO to discuss 'ongoing challenges'
South East Water looking to repair leak in Eastbourne road ‘as soon as possible’
East Hoathly Care Home Named in Care Experts UK Top 10
Eastbourne man, 23, jailed for running Brighton drugs line
Fourth member of family pulled from the water in Shoreham sadly dies