A 17-year-old boy has been arrested by detectives investigating an armed robbery at a post office in Bevendean.
A man was treated in hospital after being stabbed during the robbery.
Sussex Police said: “Detectives investigating a Brighton post office robbery have arrested a 17-year-old boy.
“On Saturday afternoon (19 January) officers executed a warrant at an address in Moulsecoomb and arrested the boy on suspicion of taking part in the robbery at the Lower Bevendean Post Office in Leybourne Parade, Bevendean, at 7.25 pm on Wednesday (16 January).
“Cigarettes and a quantity of cash were taken in the knifepoint robbery.
“The 35-year-old victim, who was punched to the face and stabbed in the leg twice, was treated at hospital for his injuries.
“After being interviewed the boy was released on police bail until 16 February while inquiries continue.”
Detective Inspector Cath O’Connor said: “We have been receiving valuable information from local people, for which we are very grateful, and we are continuing to investigate.
“If anyone has information that could help then please contact us online at https://www.sussex.police.uk/advice/advice-and-information/c/complaints/ or by calling 101, quoting Operation Fleece.
“You can also contact the independent charity Crimestoppers anonymously on 0800 555111.”