Scores of Russian sailors are training on a French warship in an Atlantic port even though its transfer to the Russian Navy is now in doubt.

About 150 Russian Navy servicemen fanned out Friday around the highly secured site where the French ship is being completed. They have been in the town of Saint Nazaire for weeks to train on the helicopter carrier, called the Vladivostok.

The French government put the delivery of the controversial ship on hold this week because of Russia's role in Ukraine's conflict. It's the biggest arms sale by a NATO country to Russia.

French President Francois Hollande said Friday that he would reassess the deal in late October, and insisted on a lasting cease-fire and political settlement in Ukraine.