A man suspected of robbing five bookmakers in Kent is thought to have struck again at William Hill in Strood High Street.
The masked man went into the betting shop shortly after 8.45pm Monday and demanded money from a member of staff.
A police spokesman said: "He made threats and had an item wrapped in plastic bag but it is not known whether it was a weapon. No-one was hurt in the incident."
The robber - described as 6ft tall, slim and wearing a balaclava, a dark hooded top and boots - escaped with cash.
Detectives think he is the same man who raided the Ladbrokes store in Holborough Road, Snodland on Friday evening.
Police also believe he robbed Coral Bookmakers in Strood High Street, twice, on Wednesday evening and also on November 29, another Coral Bookmakers in Gun Lane, Strood, on November 30 and also the Choice Bet in Snodland High Street on December 2.
Det Insp Ann Lisseman said: "This offender has become very prolific and we are urging people to come forward if they have any information.
"The man acts very quickly and is in and out of the bookmakers in less than a minute.
"Often some people in the shops do not even realise he is there."
The Association of British Bookmakers is offering a reward for any information leading to the man being caught.
Anyone with information is urged to contact police on 01634 792567 or Kent Crimestoppers on 0800 555111.
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