A man handed a note to a cashier demanding cash at Lloyds Bank in Braintree this morning.
The incident happened at 9.15am, however no money was handed over and the man left the branch.
The suspect was white, in his mid-20s, over 6ft tall of slight build, wearing a black beanie hat and dark coat.
Police conducted a search of the area but failed to locate the man.
Anyone with information should call Braintree CID on 101.
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