KYIV, June 5 - Russia launched cruise missile strike on Sunday hitting infrastructure facilities in the capital of Kyiv with Russian President Vladmir Putin warning that Moscow may start hitting “objects that we haven’t yet struck.”

Ukraine’s General Staff said Russian forces fired five X-22 cruise missiles from the Caspian Sea toward Kyiv, and one was destroyed by air defenses, The Associated Press reported. Four other missiles hit “infrastructure facilities,” but Ukraine said there were no casualties.

The Russian Defense Ministry said the missiles destroyed T-72 tanks supplied by Eastern European countries and other armored vehicles, but Ukraine’s railway authority has denied presence of any tanks were at the facility.

The authority led reporters on a guided tour of a rail car repair plant in eastern Kyiv that was hit by four missiles. The authority said no military equipment had been stored there, and Associated Press reporters saw no remnants of any tanks in the facility’s destroyed building.

“There were no tanks, and you can just be witness to this.” said Serhiy Leshchenko, an adviser to the Ukrainian president’s office.

Putin’s cryptic threat of military escalation did not specify what the new targets might be. It came days after the United States announced plans to deliver $700 million of security assistance for Ukraine that includes four precision-guided, medium-range rocket systems, as well as helicopters, Javelin anti-tank systems, radars, tactical vehicles and more.

Nuclear plant operator Energoatom said one cruise missile buzzed close to the Pivdennoukrainsk nuclear plant, 350 kilometers (220 miles) to the south, seemingly on its way to Kyiv. It warned of the possibility of a nuclear catastrophe if even one missile fragment had hit the facility.

However, a government adviser said on national TV that military infrastructure also was targeted. AP reporters saw a building burning in an area near the destroyed rail car plant. Two residents of that district said the warehouse-type structure that billowed smoke was part of a tank-repair facility. Police blocking access to the site told an AP reporter that military authorities had banned the taking of images there.

In a television interview that aired Sunday, Putin lashed out at Western deliveries of weapons to Ukraine, saying they aim to prolong the war.

“All this fuss around additional deliveries of weapons, in my opinion, has only one goal: to drag out the armed conflict as much as possible,” Putin said. He insisted such supplies were unlikely to change the military situation for Ukraine’s government, which he said was merely making up for losses of similar rockets.

If Kyiv gets longer-range rockets, he added, Moscow will “draw appropriate conclusions and use our means of destruction, which we have plenty of, in order to strike at those objects that we haven’t yet struck.”

Before Sunday’s early morning attack, Kyiv had not faced any such Russian airstrikes since the April 28 visit of U.N. Secretary-General António Guterres. (ap/ez)