Sawt Falasteen - Zelensky vows victory on 100th day of Russian invasion

Thousands of people have been killed, millions sent fleeing and towns turned into rubble, since Russian President Vladimir Putin ordered his troops into Ukraine on February 24.

Russia's advance has been slowed by a fierce Ukrainian resistance which repelled them from around the capital and forced Moscow to shift its aims towards capturing the east.

"Victory will be ours," Zelensky said in a video address similar to one he posted at the onset of the war outside government buildings in Kyiv.

But Kremlin spokesman Dmitry Peskov said: "certain results have been achieved", pointing to the "liberation" of some areas from what he called the "pro-Nazi armed forces of Ukraine".

The West has sent ever more potent weapons to Ukraine and piled on ever more stringent sanctions, with the EU also on Friday formally adopting a ban on most Russian oil imports.

Putin's alleged girlfriend, former gymnast Alina Kabaeva, was also added to an assets freeze and visa-ban blacklist, along with Russian army personnel suspected of war crimes.

At the same time, the United Nations said it was leading intense negotiations with Russia to allow tens of millions of tons of grain to leave Ukrainian ports to avert a global food crisis.

"I am optimistic that something could give in, something could be made," said Amin Awad, the UN crisis coordinator for Ukraine, voicing hope that we could "see a breakthrough".

Russian troops now occupy a fifth of Ukraine's territory and Moscow has imposed a blockade on the country's Black Sea ports.

- 'Levelling everything' -

The UN has warned that especially African countries, which imported more than half of their wheat consumption from Ukraine and Russia, face an "unprecedented" crisis caused by the conflict.

Food prices in Africa have already exceeded those in the aftermath of the 2011 Arab springs and the 2008 food riots.

On Friday, Putin met the head of the African Union, Senegalese President Macky Sall, at his Black Sea residence in Sochi.

At the opening of those talks, Sall told Putin to "become aware" African countries "are victims" in the Ukraine conflict.

Putin's troops are now concentrating their forces in the Donbas, in the east, where some of the fiercest fighting is centred on the industrial hub city of Severodonetsk.

Fighting continues in Severodonetsk's city centre, the president's office said, adding that the invaders were "shelling civilian infrastructure and Ukrainian military".

Severodonetsk "is the toughest area at the moment," Zelensky said late Thursday.

"For 100 days, they have been levelling everything", Lugansk regional governor Sergiy Gaiday said on Telegram.

Accusing Russian troops of destroying hospitals, schools and roads, Gaiday said, however, that "we are only getting stronger.

"Hatred of the enemy and faith in our victory make us unbreakable."

- 'Getting worse' -

Ukrainian troops were still holding an industrial zone, Gaiday said, a situation reminiscent of Mariupol, where a steelworks was the south-eastern port city's last holdout until Ukrainian troops finally surrendered in late May.

The situation in Lysychansk -- Severodonetsk's twin city, which sits just across a river -- also looked increasingly dire.

About 60 percent of infrastructure and housing had been destroyed, while internet, mobile network and gas services had been knocked out, said the city's mayor Oleksandr Zaika.

"The shelling is getting stronger every day," he said.

In the city of Sloviansk, about 80 kilometres (50 miles) from Severodonetsk, the mayor has urged residents to evacuate as bombing intensified and water and electricity are cut off.

Student Gulnara Evgaripova, 18, recounted heavy bombardments as she boarded a minibus to leave the city.

Ekaterina Perednenko, a paramedic, said: "I am scared that there will be nothing to come back to".

In a statement, Awad said: "This war has and will have no winner.

"Rather, we have witnessed for 100 days what is lost: lives, homes, jobs and prospects."

burs-dt/jm

I.Saadi--SF-PST