Westerly police say the man and woman took a taxi Tuesday to the Washington Trust Bank, went inside and demanded money, saying they were armed with explosives.

The teller gave the woman an undisclosed sum.

Outside, the duo got back in the cab and took off. Police Chief Edward Mello says the driver had no idea what had happened.

A few minutes later, police found the cab, and the man, across the border in Stonington, Conn. The woman was nowhere to be found.

Ronald Hayes was arrested and being held Wednesday before a court appearance.

Mello says they’ve identified the woman but won’t release her name. He says they’re suspected in another robbery in Montville, Conn.