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California's 'Geezer Bandit' strike for the 13th time

An 'elderly' thief, who is nicknamed the 'Geezer Bandit', is being hunted by police in California after he pulled off his thirteenth bank robbery.

The FBI is offering a $20,000 reward for information leading to the arrest of the man, who is thought to be in his 70s and has eluded authorities despite being pictured clearly on CCTV footage.

On Friday afternoon, wearing his standard outfit of dark glasses, a blazer, dark trousers and a hat, he robbed a branch of Bank of America in Santa Barbara after threatening a cashier with a pistol.

The bank and investigators in the USA have not been disclosed how much money the man escaped with.

It was his first successful raid of the year, and came after 11 similar bank robberies in the San Diego region in 2009, and another in Bakersfield last November.

Investigators are considering the possibility that his distinctive appearance is actually a disguise. A witness to a previous robbery said he looked as though he was wearing an "old man" Halloween outfit.

Last year a white bank robber in Ohio used a "hyperrealistic" mask to disguise himself as a black man, prompting police to mistakenly arrest an African American man for his crimes.