An armed raider escaped with more than £400 after holding up a betting shop.
The robber pulled a distinctive diamond patterned jumper over his mouth and nose as he went into Ladbrokes in South Street, Portslade, on Friday.
He threatened staff who were forced to hand over £435 before he fled from the shop just before 4.30pm.
Police appealed for witnesses to the raid. Det Con Chris Mason-Walshaw said: "This is a busy area. Ladbrokes is next to a fish and chip shop and customers may have seen him.
"The jumper he was wearing is very distinctive and it appeared to be so new it might have been given to him as a Christmas present."
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