Necco, the country’s oldest continuous candy producer, unexpectedly shut down its factory Tuesday. Round Hill Investments LLC purchased the company, which is known for producing wafers and candy hearts, in May at a bankruptcy auction, but sold it again in a deal that finalized Tuesday. “After careful engagement and consideration...the firm decided to sell the brands to another national confection manufacturer and today announced the closure of the operations in Revere, Massachusetts,” Round Hill Investments said. It did not name the buyer or say whether Necco would produce candy again. CEO Michael McGee reportedly told workers at a meeting that Necco was closing “effective immediately.” An employee named Chris told the Boston Globe that workers were surprised. “We were told don’t show up tomorrow [Wednesday],” he said. A few weeks ago, Necco’s bankruptcy trustee said in court that Round Hill Investments was trying to back out of a payment.