PARIS — Two warships that France agreed to sell to Russia might never be delivered, the French defense minister said on Friday, drawing an angry response from Moscow, which said Paris must honor its contract in full.

The remarks by Defense Minister Jean-Yves Le Drian came a week after President François Hollande said France would postpone the handover of the first of the ships to the Russian Navy “until further notice.”

“It is possible that we never deliver them,” Mr. Le Drian said in an interview on the news channel BFM TV. “The Russians must realize this situation.”

The Mistral-class ships are designed to transport several hundred troops to a battlefield by sea, along with the equipment and support they would need, including tanks and helicopters.