Sergei Shoigu said on Thursday that the Kremlin had already asked why the ships had not been delivered by France, as per an agreement between two countries, but had failed to get an adequate answer.
The Russian Federal Service for Military-Technical Cooperation issued a warning notice to France on Jan. 13 after the delivery of the Vladivostok, scheduled to be delivered in late 2014, and the Sevastopol, set to be handed over in 2015, failed to materialize.
- Ukraine conflict
Russia paid €1.2 billion for the two Mistral helicopter carriers after a deal to construct and deliver the vessels was signed between the French company DCNS and Russia's Rosoboronexport in 2011.
France threatened to suspend the delivery of the ships in September in 2014 over Russia's alleged involvement in the conflict in east Ukraine.
A French spokesman later clarified that the delivery of the ships had not been legally suspended, only that French President Francois Hollande had declared he would not approve the transfer of the two ships to Russia unless the situation in Ukraine improved.