An worldwide warrant has since been issued for his arrest, but Swedish police spokesman Stefan Dangardt said no arrest has been made in Sweden.
Icelandic police say Stefansson was able to board the flight to Sweden at at Iceland's worldwide airport in Keflavik by travelling on someone else's passport. Icelandic media have the case the "Big Bitcoin Heist". 'We are sure of that'.
Stefansson had recently been transferred to a low-security prison that has no fences and provides internet and phone access to inmates, and guards didn't actually notice he was missing until the plane carrying him to freedom had already taken off. The computers are specially created to mine bitcoin and are worth a reported 200 million Icelandic Krona ($2 million, £1.4 million).More news: Syrian forces launch major attack on rebels in Qalamoun
More news: Riyadh says open to sending troops to Syria
More news: Microsoft has created a unique web-protection for Google Chrome
A passenger on the same flight to Sweden as Mr Stefansson told national broadcaster RUV that Iceland's Prime Minister, Katrin Jakobsdottir, was also on that flight. Police said that CCTV footage from the airport shows Stefansson boarding a flight to Sweden that was coincidentally also carrying the country's prime minister, Katrin Jakobsdottir.
"He had an accomplice", police chief Gunnar Schram said. Jakobsdottir was among five Nordic prime ministers who met with India's Prime Minister on Tuesday in Stockholm.
He and 10 others were arrested for allegedly stealing nearly 600 high-powered computers that stored bitcoins - a cryptocurrency in December and January.
Police commissioner Olafur Helgi Kjartansson told The Associated Press in March it was 'a grand theft on a scale unseen before'. The owners of the machines have offered $60,000 as a reward for anyone who can help locate the machines. "The underworlds are tiny and it is extremely hard to hide, let alone flee the country".