The fraud was discovered by the Swedish Tax Agency when they conducted a regulatory investigation of the companies invovled in the tunnel's renovation.
Two company executives involved in the project are now suspected of severe fraud and tax crimes. The prosecutor and the Tax Agency say that the money was pilfered from the project through the use of false invoices.
According to Expressen, the main suspect, who is believed to have transferred the money onto his and his wife's private bank account, denies the charges. The other suspect is beleived to have been an accomplice to him.
Another man was reportedly terminated from his executive position at the traffic office at the City of Stockholm during the investigation.