A group of gunmen today looted around Rs 20 lakh in cash and jewellery from a nationalised bank branch in Angul district, police said.
Six men armed with crude pistols entered branch in Angul posing as customers and locked up staff members and customers in a room.
They also taken away their mobile phones, police said.
Eye-witnesses said the looters, who were speaking in Hindi and Bengali, took away the booty in bags they had carried with them.
"We have got some clues and a thorough investigation is being conducted," Angul Superintendent of Police, Mitrabhanu Mohapatra said.
The police of neighbouring areas have been alerted, he said.