French President Francois Hollande is meeting with his Russian counterpart in an impromptu visit to Moscow, Russian news agencies report.

The French leader met with Vladimir Putin at a Moscow airport on Saturday in an unexpected stopover visit, as he traveled from neighboring Kazakhstan back to Paris.

Last month, France suspended the planned delivery of a warship to Russia after coming under intense pressure from its allies to suspend the sale because of tensions between Russia and Ukraine. On Friday, France's defense minister said in a TV interview that the delivery may be cancelled altogether if the political situation doesn't change.

Western nations have accused Russia of fueling a pro-Russian insurgency in east Ukraine with arms and personnel, in a conflict that has claimed at least 4,300 lives since April.