Meanwhile, NATO Secretary-General Jens Stoltenberg called an emergency meeting of the alliance’s envoys to discuss the events close to the Ukrainian border in Poland.
Poland’s statement did not address the circumstances of the strike, including whether it could have been a targeting error or if the missile could have been knocked off course by Ukrainian missile defenses.
If Russia had deliberately targeted Poland, it would risk drawing the 30-nation alliance into the conflict at a time when it is already struggling to fend off Ukrainian forces.
Polish media reported that the strike took place in an area where grain was drying in Przewodów, a village near the border with Ukraine.
The Russian Defense Ministry denied being behind “any strikes on targets near the Ukrainian-Polish border” and said in a statement that photos of purported damage “have nothing to do” with Russian weapons.
Polish Foreign Minister Zbigniew Rau summoned the Russian ambassador and “demanded immediate detailed explanations,” the government said.
On Tuesday, Russia pounded Ukraine’s energy facilities with its biggest barrage of missiles yet, striking targets across the country and causing widespread blackouts.
The barrage also affected neighboring Moldova. It reported massive power outages after the strikes knocked out a key power line that supplies the small nation, an official said.
The missile strikes plunged much of Ukraine into darkness and drew defiance from Zelenskyy, who shook his fist and declared: “We will survive everything.”
In his nightly address, the Ukrainian leader said the strike in Poland offered proof that “terror is not limited by our state borders.”
“We need to put the terrorist in its place. The longer Russia feels impunity, the more threats there will be for everyone within the reach of Russian missiles,” Zelenskyy said.
Russia fired at least 85 missiles, most of them aimed at the country’s power facilities, and blacked out many cities, he said.
The Ukrainian energy minister said the attack was “the most massive” bombardment of power facilities in the nearly 9-month-old Russian invasion, striking both power generation and transmission systems.
The minister, Herman Haluschenko, accused Russia of “trying to cause maximum damage to our energy system on the eve of winter.”
The aerial assault, which resulted in at least one death in a residential building in the capital, Kyiv, followed days of euphoria in Ukraine sparked by one of its biggest military successes — the retaking last week of the southern city of Kherson.
The power grid was already battered by previous attacks that destroyed an estimated 40% of the country’s energy infrastructure. Zelenskyy said the number of Ukrainians without power had fallen from 10 million to 2 million by Tuesday evening.
Russian President Vladimir Putin has not commented on the retreat from Kherson since his troops pulled out in the face of a Ukrainian offensive. But the stunning scale of Tuesday’s strikes spoke volumes and hinted at anger in the Kremlin.
By striking targets in the late afternoon, not long before dusk began to fall, the Russian military forced rescue workers to labor in the dark and gave repair crews scant time to assess the damage by daylight.