Around 400 Russian sailors are in France for training on warship that France is selling to Russia despite US concern over Ukraine crisis.
The French and German leaders spoke to their Russian counterpart by phone hours after a Ukranian army plane was shot down leaving 49 dead.
The Russian and French leaders are to meet for talks on Ukraine and 'bi-lateral issues' on the eve of June 6 D-Day commemorations in France.
Though US wants France to delay or scrap €1.2 billion contract, French officials say ending contact would harm Paris more than Moscow.
French president says deal over sale of two Mistral warships was signed back in 2011 and will be completed in October despite Ukraine crisis.
France's Francois Hollande and German chancellor Angela Merkel hint at tougher sanctions if presidential elections on May 25 do not take place.
François Hollande will visit Russia's southern neighbour as it mulls signing same EU pact that was rejected by Ukraine's former president.
US Secretary of State John Kerry tells press conference that there was no breakthrough after four hours of talks with his Russian counterpart.
The US Secretary of State meets in Paris with Russian foreign minister on Sunday evening for talks at the Russian ambassador's residence.
The US Secretary of State and Russian foreign minister Sergey Lavrov are to meet on Sunday in an effort to defuse tensions in current standoff.
France will also offer to send four fighter jets to Baltic states to boost NATO air patrols over the region should the military alliance request them.
Foreign minister Laurent Fabius says £1bn contract for two high-tech Mistral warships could be blocked if situation escalates.
Foreign minister Laurent Fabius warns measures against Russia could kick in soon if Moscow does not respond to Western proposals to solve crisis.
The troop, tank and helicopter carrier is part of a 1.2-billion-euro deal, the biggest-ever sale of NATO weaponry to Moscow, agreed in 2011.
US state secretary John Kerry and Russian counterpart Sergei Lavrov held their first face-to-face talks, which are to continue over coming days.