KYIV, May 3 - Russia claimed it foiled an attack by Ukrainian drones on the Kremlin early Wednesday, calling it an unsuccessful assassination attempt against President Vladimir Putin and promising retaliation for what it termed a “terrorist” act. The Ukrainian president denied it, saying: “We don’t attack Putin or Moscow,’ The Associated Press reported.

Putin wasn’t in the Kremlin at the time and was at his Novo-Ogaryovo residence outside Moscow, his spokesman Dmitry Peskov told Russia’s state news agency RIA Novosti.

There was no independent verification of the purported attack, which Russia authorities said occurred overnight but presented no evidence to support it. Questions also arose as to why it took the Kremlin hours to report the incident and why videos of it also surfaced later in the day.

A video posted overnight on a local Moscow news Telegram channel, shot from across the river from the Kremlin, appeared to show smoke rising over the buildings. It wasn’t possible to ascertain its veracity. According to text accompanying the footage, residents of a nearby apartment building reported hearing bangs and seeing smoke around 2:30 a.m.

Another video on social media, which looks to be taken from across Red Square, appears to show the moment a drone explodes in a flash of fire above the roof of the Senate Palace in the Kremlin, near a flagpole flying the Russian tricolor, with debris falling on the roof. It also was not possible to independently verify this footage.

The Kremlin said Russian military and security forces had stopped the drones before they could strike. Nobody was hurt, it added. Its official website said debris from the drones fell on the Kremlin grounds without damage.

President Volodymyr Zelenskyy, on an unannounced visit to Helsinki for talks with the leaders of five Nordic countries, denied any role.

“We don’t attack Putin or Moscow. We fight on our territory. We’re defending our villages and cities,” he said at a news conference.

Ukraine presidential adviser Mykhailo Podolyak said the claims could provide a pretext for Russia “to justify massive strikes on Ukrainian cities, on the civilian population, on infrastructure facilities.”

White House press secretary Karine Jean-Pierre said the U.S. was “unable to confirm the authenticity” of Russia’s claim.

Asked whether the U.S. believed Putin was a lawful target of any potential Ukrainian strike, Jean-Pierre said that since the start of the conflict, the U.S. was “not encouraging or enabling Ukraine to strike beyond its border.”

U.N. deputy spokesman Farhan Haq said that the United Nations “is not in a position to confirm these reports. We strongly reiterate our call on all concerned to refrain from any rhetoric or action that could further escalate the conflict,” Haq said.

The purported drone attack would be a significant escalation in the 14-month conflict, with Ukraine taking the war to the heart of Russian power.

Phillips O’Brien, professor of strategic studies at the University of St. Andrews, said, “It certainly wasn’t an attempt to assassinate Putin, because he doesn’t sleep in the roof and he probably never sleeps in the Kremlin.”

He added it was too soon to prove or disprove whether it was a Russian attempt “either to make Ukraine look reckless or to buck up Russian public opinion” or if it was a Ukrainian operation to embarrass Russia.

The Kremlin claimed the attack was planned to disrupt Victory Day, which Russia celebrates in Red Square on May 9 to commemorate the defeat of Nazi Germany in World War II. Peskov said the parade would go on as scheduled.

Zelenskyy was in Finland seeking greater firepower for his armed forces as they figure out how to dislodge Russian troops from occupied areas of Ukraine.

Both Ukraine and Russia reportedly have experienced ammunition shortages after a winter of long-range shelling and missile strikes. Kyiv has been pressing its allies for more as officials consider when to start driving Russian forces out of Ukrainian territory they occupy.

Zelenskyy said Ukraine’s counteroffensive is coming “very soon.”

This year “will be decisive … for victory,” he said.

The Nordic countries — Finland, Sweden, Norway, Denmark and Iceland — have been among Kyiv’s strongest backers since Russia invaded Ukraine in February 2022. Before meeting Zelenskyy, Nordic officials appeared ready to provide more aid.

“Here in the north, we have a more unpredictable and aggressive Russian neighbor, and it is important that we discuss together how to face this new situation,” Norwegian Prime Minister Jonas Gahr Støre said.

In fighting Wednesday, 16 civilians were killed in a “massive attack” by Russian forces on southern Kherson province, the Prosecutor General’s Office said.

Russian fire hit the train station and the only open supermarket in the regional capital, also called Kherson, killing 12 people and wounding 22, officials said. Three energy workers died when they came under fire while making repairs north of the city.

Military analysts think Ukraine is targeting Russian supply lines while gearing up for a possible counteroffensive amid improving weather and as it receives more weapons and ammunition from the West. (ap/ez)