A Nigerian believed to be working with the United Nations headquarters was on Monday arrested for robbing four banks over a two-month span.

According to the New York Post, the accused Abdullahi Shuaibu, 53, was charged with two counts of robbery and two counts of attempted robbery.

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Mr. Shuaibu allegedly committed the first robbery on February 27 when he walked into a Santander Bank and demanded that the teller hand him cash, threatening to shoot if the employee did not comply.

Subsequently, he had failed in an attempt to rob a Bank of America but became successful later in the month when he robbed a separate Santander Bank location.

Mr Shuaibu is reported to have walked into an HSBC bank on Monday, where he handed a note to the teller demanding money.

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When the teller tried questioning him, he told her he had a gun and gestured to his hand in his jacket pocket.

A retired police officer working at the UN made Mr Shuaibu out from a surveillance photo previously released by the New York Police Department. Luck run out on him and was arrested after returning to work that afternoon.