The death toll from overnight Russian missile strikes on eastern Ukraine's Pokrovsk climbed to seven Tuesday as rescue workers combed through the rubble of damaged buildings.

Pokrovsk sits just 50 kilometers (30 miles) from the eastern frontline, where Moscow says it is gaining ground and repelling Ukrainian attacks.

Two missiles – launched 40 minutes apart – damaged residential buildings, a hotel, catering establishments, shops and administrative buildings earlier Monday, Pavlo Kyrylenko, head of the Donetsk region's military administration said.

Correspondents for the Agence France-Presse (AFP) reported rescuers evacuating survivors from the rubble of a five-story building and carrying the wounded into ambulances.

Seven people died and 67 were wounded, including two children, according to Igor Klymenko, Ukraine's minister of internal affairs.

Those killed included a high-ranking emergency official of the Donetsk region, Klymenko said.

"We are resuming the demolition of rubble," he said early Tuesday after the rescuers "were forced to suspend work for the night due to the high threat of repeated shelling."

President Volodymyr Zelenskyy on Monday said that Moscow had struck a residential building, and shared a video on social media of civilians helping wounded people and rescuers clearing rubble from a building that had lost its top floor.

The footage also showed a second building that appeared heavily damaged.

The city had a population of around 60,000 people prior to the Russian invasion.

Russia advances

Also on Monday, Russia said it had recently advanced three kilometers towards Kupiansk in northeastern Ukraine around 150 kilometers north of Pokrovsk and a few dozen kilometers from the Russian border.

Kupiansk and its surroundings in the Kharkiv region were retaken by Ukrainian forces in September, but Moscow has renewed its assault on the area.

"Over the past three days, the advance of Russian troops ... amounted to 11 kilometers along the front and more than 3 kilometers deep into the enemy's defense," Moscow's Defence Ministry said.

It said that it had "improved" its standing along the frontline and continued to repel Ukrainian counterattacks.

On Saturday, Russia struck a blood transfusion center in Kruglyakivka – near Kupiansk – with a "guided air bomb," killing at least two people and wounding four, Kyiv said.

Two more people in Kruglyakivka died Monday when Russia attacked with "four guided aerial bombs," according to Oleg Synegubov, governor of the Kharkiv region.

In mid-July, Ukraine said that it was in a "defensive position" in the Kupiansk area as the Russian army launched an offensive there.

Ukraine began its long-awaited counteroffensive in June but has made modest advances in the face of stiff resistance from Russian forces.

Saudi talks

On the diplomatic front, Ukraine said Monday it was "satisfied" after a peace summit held in Saudi Arabia, to which Moscow was not invited.

Representatives from around 40 countries including China, India, the United States and Ukraine took part in the weekend summit in Jeddah.

The initiative was greeted with scorn by Moscow on Tuesday.

"We have become eyewitnesses of yet another unsuccessful attempt by the U.S. administration to pass off their wishes for reality. There was no diplomatic success in Jeddah," said Russian ambassador to Washington, Anatoly Antonov, as quoted by state news agency RIA Novosti.

The diplomat said it was pointless to discuss the crisis in Ukraine without Russia's participation.

"Does anyone still not understand that in such a situation it is impossible to achieve a specific result?" he said.