On June 11, 2010, the Bulgarian government announced that it would freeze indefinitely the planned construction of the Belene nuclear power plant because it was uncertain when the investment would be returned. Five months later, on December 2, a non-binding memorandum of understanding was signed between NEK EAD, Rosatom, Altran and Fortum, setting up a 6.3 bln. euro price on the power station, after months of unsuccessful talks on the cost and redeemability of the project itself. Further disagreement and the persistent demands of the Bulgarian government to lower the cost under 5.0 billion euro led to the termination of the project in March 2012. However, in late 2012 the opposition initiated a referendum petition which was signed by 1,385,283 people and the first national referendum in the history of modern Bulgaria was held on January 27, 2013. A majority of the people had voted ′Yes' to the construction of a new nuclear power plant, but despite that, the number of voters who attended the voting was too low for it to pass. The referendum passed the question further to the Parliament, which decided on 27 February 2013 to suspend it. In June 2018 the Bulgarian Parliament voted to abolish the moratorium on the construction of the power plant and in December 2019 Minister of Energy announced that five companies placed bids and have been selected as prospective strategic investors in the project.