Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty

Emergency workers were still looking for survivors Monday following a strike on a high-rise apartment building on Saturday in the Ukrainian city of Dnipro.

The death toll rose to 40 dead, including three children, making it the deadliest strike on a residential area in Ukraine in the last three months.

Ukrainian President Volodymyr Zelenskyy called the attack "Russian terror," saying Ukraine was "fighting for every person, every life" under in rubble in Dnipro and would "find everyone involved in this terror."

The attack on an apartment building destroyed 72 units and wounded 75 residents.

Rescuers have been using cranes to remove chunk after chunk of rubble, looking for survivors.

One of the survivors, Yevgeni, told ABC News that he was in his bed when the missile struck his apartment.

"I can’t understand. I didn’t hear any bang, any voice, any sound of the missile," said Yevgeni, adding that he suffered a head injury and that his broken window frame fell on him.

He described seeing smoke and "a lot of dust" at the scene. He said "the most scary thing (was hearing) the voices of people screaming."

Local resident Natali Nodykova told ABC News that a friend called her to tell her there was a bombing in her neighborhood.

"My son was alone at home and of course I was afraid," Nodykova said.

Emergency workers rescued 39 people, Ukrainian officials said. Twelve people remained unaccounted for Monday.

The attack was caused by a Soviet-made Kh-22, a long-range missile used to take down aircraft carriers, according to the Ukrainian Air Force.

The massive 13,000-pound missile causes huge amounts of casualties when used in civilian areas.

The Kremlin denied the attack, saying Russia doesn’t strike residential areas and claiming the destruction was a result of Ukrainian air defense.

The same type of weapon had been used in a previous attack on a shopping mall in the town of Kremenchuk back in July that killed 22 people, according to Ukrainian authorities.

-ABC News' Ibtissem Guenfoud, Bruno Roeber, Oleksii Pshemyskiy, Matt Gutman and Max Uzol

The death toll climbed to 40 on Monday from a weekend missile strike on a high-rise apartment complex in the central Ukrainian city of Dnipro, according to Ukrainian officials.

At least three children were among those killed, officials said. Another 70 people were injured.

The death toll is expected to rise as 30 people remain unaccounted for, officials said.

On Saturday, a missile slammed into a block of high-rise apartment buildings in the central Dnipro. While Ukrainian officials blamed Russia for the strike, one of the deadliest attacks since the war began, the Kremlin denied Russia was involved.

“The Russian armed forces do not strike residential buildings or social infrastructure, they strike military targets,” Kremlin spokesman Dmitry Peskov told reporters Monday.

-ABC News' Matt Gutman

The death toll from a Russian missile strike on a block of high-rise apartment buildings in the central Ukrainian city of Dnipro rose to 29 on Sunday.

Amidst the devastation, rescuers pulled one woman alive from the rubble on Sunday and officials said she was saved by a cocoon of concrete that surrounded her.

The survivor was rescued from a block of apartment buildings hit by a Russian missile on Saturday in the city about 500 miles southeast of the capital of Kyiv.

Ukrainian President Volodymyr Zelenskyy said a child was among those killed in the Dnipro missile attack.

Despite Sunday's rescue, emergency workers said the hope of finding more survivors is fading.

The rocket attack reduced part of a high-rise apartment building to a pile of rubble that was still smoldering on Sunday. Noxious fumes from burning couches, curtains and TVs emanated from the pile as firefighters sprayed water hoses on it and rescue workers dug through the debris with their bare hands, an ABC News crew in Dnipro reported.

In addition to the now 29 killed in the attack, more than 70 people were injured, Ukrainian officials said. The strike left hundreds of apartments uninhabitable, officials said.

Emergency crews brought in cranes Sunday to help move large pieces of debris.

As the rescue operation went on Sunday, periodic moments of silence were called for so rescuers could listen for cries for help from people feared missing in the rubble.

-ABC News' Matt Gutman

Five people were killed and at least 27 were wounded in a Russian attack in Dnipro in central Ukraine, according to the governor.

An apartment block was struck and at least two children are among the injured, according to the deputy head of the president’s office.

-ABC News’ Yulia Drozd