BUCHA, Ukraine (AP) — Russia used its long-range arsenal to bombard anew several areas of Ukraine on Friday, killing at least two civilians and damaging homes as Ukrainians commemorated the anniversary of the liberation of Bucha from a brutal occupation by the Kremlin’s forces.

President Volodymyr Zelenskyy said that Bucha, a town near Kyiv, stands as a symbol of the atrocities the Russian military has committed since its full-scale invasion of Ukraine began in February 2022.

“We will not let it be forgotten,” Zelenskyy said at a formal ceremony in Bucha, vowing to punish those who committed outrages in the town. “Human dignity will not let it be forgotten. On the streets of Bucha, the world has seen Russian evil. Evil unmasked.”

At the same time as the Bucha commemorations, the Kremlin-allied president of Belarus raised the stakes in the 13-month war when he said that Russian strategic nuclear weapons might be deployed in his country, along with part of Moscow’s tactical nuclear arsenal.

Moscow said earlier this week it planned to place in neighbouring Belarus tactical nuclear weapons that are comparatively short-range and low-yield. Strategic nuclear weapons such as missile-borne warheads would bring a greater threat.

Zelenskyy dedicated his attention to an official ceremony in Bucha, where he was joined by the president of the Republic of Moldova and the prime ministers of Croatia, Slovakia and Slovenia.

The Kremlin’s forces occupied Bucha weeks after they invaded Ukraine and stayed for about a month. When Ukrainian troops retook the town, they encountered horrific scenes: bodies of women, young and old men, in civilian clothing, lying in the street where they had fallen or in yards and homes.

Other bodies were found in a mass grave. Over weeks and months, hundreds of bodies were uncovered, including some of children.

Russian soldiers on intercepted phone conversations called it “zachistka” — cleansing, according to an investigation by The Associated Press and the PBS series “Frontline.”

Such organised cruelty — used by Russian troops in past conflicts as well, notably in Chechnya — was later repeated in Russia-occupied territories across Ukraine.

Zelenskyy handed out medals to soldiers, police, doctors, teachers and emergency services in Bucha, as well as to families of two soldiers killed during the defense of the Kyiv region.

“Ukrainian people, you have stopped the biggest anti-human force of our times,” he said. “You have stopped the force which has no respect and wants to destroy everything that gives meaning to human life.”

More than 1,400 civilian deaths, including 37 children, were documented by Ukrainian authorities, Zelenskyy said.

More than 175 people were found in mass graves and alleged torture chambers, according to Zelenskyy. Ukraine and other countries, including the US, have demanded that Russia answer for war crimes.