A six-day local ceasefire in Oleshky and the surrounding area was reached after mediation efforts by US First Lady Melania Trump and with the involvement of Pope Leo.
The ceasefire expired at midnight Moscow time (8am Monday AEDT). There was no immediate indication of any resumption of hostilities on either side.
It was the longest local pause in fighting since Russia's full-scale invasion in 2022.
Ukraine's Ombudsman for Human Rights Dmytro Lubinets said both sides had "upheld the obligations they undertook throughout the duration of this period".
Lubinets said he and Yana Lantratova, Russia's commissioner for human rights, were "exploring possibilities to continue similar humanitarian efforts. It is important to maintain this interaction mechanism so that we can keep helping people and saving lives".
Earlier, Ukraine's General Staff issued a statement saying that its units, in co-operation with local authorities, "evacuated 167 civilians to safer points in the Kherson region".
It said the evacuees included 22 children and 21 people with limited mobility requiring special assistance.
The governor of Kherson region, Oleksandr Prokudin, urged residents to be vigilant as the expiry of the ceasefire neared.
"I also strongly urge you not to visit the so-called 'red zones' - areas and settlements near the Dnipro," Prokudin wrote on Telegram.
"The intensity of Russian strikes there remains high, and the threat to life is extremely high."
Kremlin spokesman Dmitry Peskov, quoted by Russian news agencies, said Russia had a positive view of how the operation was conducted in Oleshky.
The Pope said he hoped co-operation between Russia and Ukraine in implementing a ceasefire in Oleshky would pave the way for broader peace efforts.
Melania Trump, writing on X, said the ceasefire "has provided residents with the freedom to move, access to food, clean water, medicine, plus a renewed sense of dignity without the constant threat of attack".
On Saturday, starved and exhausted residents of Oleshky crossed into Ukraine after a circuitous journey from the area, just a few kilometres from the front line.
They first travelled by bus via Crimea, annexed by Russia from Ukraine in 2014, to the Russian town of Anapa, before flying to Belarus from where they continued to Ukraine.
Those wishing to leave Oleshky - some for Russia, some for Ukraine - were taken initially to Crimea in 25 buses and nine ambulances, Lantratova said, before splitting into separate convoys.
The ceasefire, in place since Tuesday, allowed for the roads to be demined and food, medicines and other supplies brought into the town.
Russian forces took control of the town immediately after the February 2022 invasion of Ukraine, but Ukrainian troops recaptured much of the region, including the town of Kherson, later that year.
The war continued in other parts of Ukraine on Sunday, with no let up in fighting along the front line and both sides kept up long-range air attacks.
Regional governors and emergency services reported one death in a strike in the Sumy region on the Russian border, a frequent target, and at least one in the central region of Vinnytsia.
Russian strikes cut electricity to hundreds of thousands of households in four Ukrainian regions overnight, while Russian authorities reported major damage to an industrial site following Ukrainian drone attacks on Nizhny Novgorod region.
"The intensity of the strikes is very high, and the Russians are seeking to maximally exploit the deficit of ballistic missile interceptors," President Volodymyr Zelenskiy said on X.
Ukraine, meanwhile, hit the Kamensky plant in Russia's Rostov region, which he said was involved in the manufacture of Russian missiles.
with AP
