The former president of Russia Dmitry Medvedev warned that the war in Ukraine could last decades, with periods of fighting punctuated by ceasefires, Russia’s state-run RIA news agency reported Thursday.

Mr. Medvedev, who is currently vice chairman of Russia’s powerful national security council, made the assessment during a visit to Vietnam.

The former president ally of current president Vladimir Putin, he is accustomed to harsh positions on war. Last month, he called the Ukrainian government a “contamination.”

“This conflict will last a very long time, probably decades,” Mr Medvedev said, according to RIA. “As long as there is such a government there, we will have (…) three years of truce, two years of war and all over again,” he predicted, repeating Moscow’s claim that Kiev is ruled by Nazis.

Alert for missile strikes in Kiev

The military administration of the Ukrainian capital reported today that there is an increased risk of Russian missile strikes, adding that air defense systems were activated.

Since last October, Russia’s armed forces have launched hundreds of missile attacks across Ukraine, specifically targeting infrastructure. In recent weeks, Ukrainian military authorities say they have destroyed most of the missiles.

“Increased risk of missile strikes! Air defense is working in the area,” the Kyiv regional military command said via Telegram.

No information on casualties or damage has been released by the Ukrainian authorities so far.