Ukrainian servicemen patrol an area near a frontline in Donetsk Region, Ukraine. Reuters
The eastern Donetsk region has faced the brunt of Russia's offensive since its assault on Kyiv failed weeks into the invasion launched on February 24.
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President Volodymyr Zelensky warned in his daily address that thousands of people, including children, were still in the region's battleground areas, with six civilians killed and 15 wounded on Friday, according to the Donetsk governor.
"There's already a governmental decision about obligatory evacuation from Donetsk," Zelensky said, underscoring authorities' calls to leave the besieged region in recent weeks.
"Leave, we will help," Zelensky said. "At this stage of the war, terror is the main weapon of Russia."
Ukraine President Volodymyr Zelensky speaks in Kyiv. File photo
Official Ukrainian estimates put the number of civilians still living in the unoccupied area of Donetsk at between 200,000 and 220,000.
A mandatory evacuation notice posted Saturday evening said the coming winter made it a matter of urgency, particularly for the more than 50,000 children still in the region.
"They need to be evacuated, you cannot put them in mortal danger in the winter without heating, light, without the ability to keep them warm," Kyiv's Ministry of Reintegration of Temporarily Occupied Territories said in a statement.
Zelensky, in his address, also once more pressed the international community, especially the United States, to have Russia officially declared a "state sponsor of terrorism".
A Donetsk People's Republic militia's multiple rocket launcher fires from its position. AP
The call came a day after a jail holding Ukrainian prisoners of war in Kremlin-controlled Olenivka was bombed, leaving scores dead, with Kyiv and Moscow trading blame.
On Saturday, Ukrainian human rights official Dmytro Lubinets said on national television he had asked the International Committee of the Red Cross (ICRC) and the United Nations Human Rights Monitoring Mission to go to Olenivka.
The ICRC has made a request but not yet obtained authorisation from the Russians, he said.
Energoatom, operator of the Zaporizhzhia nuclear power plant in the south of the country, said on Saturday that parts of the facility had been "seriously damaged" by military strikes and one of its reactors was forced to shut down.
Incessant shelling has left Ukrainian forces defending ruins in Sievierodonetsk, but their refusal to withdraw is stalling a massive Russian offensive across the Donbas.
Zelensky expressed confidence in Ukraine's ability to reclaim territory, calling on the nation's allies to send more weapons. "We just need enough weapons to ensure all of this. Our partners have them."
The Coromandel Express, which runs from Kolkata to Chennai, derailed and fell on the opposite track, with many people still trapped, the reports said.
Sheikh Mohammed added in a tweet on Twitter: "We found its executive director at the service counters, receiving customers, speeding up procedures, and contributing to clearing transactions. The secret shopper assured us that providing the service did not exceed five minutes."
The first lady arrived in Cairo from Amman, where she attended the wedding of Crown Prince Hussein. She is travelling to Morocco on Saturday before heading to Portugal, the final stop of her tour, on Monday.