Russia and Ukraine have called for foreign volunteers to join their sides.
Russian air strikes hit at a Ukrainian military base near Poland, in the most western attack yet in Russia's invasion.
Turkey says the two sides agreed to keep communication channels open despite disagreements.
Mariupol city council says more than 2,000 people have been killed since the city was besieged by Russian forces.
Russia says sanctions have prevented access to $300bn of Moscow's $640bn gold, foreign exchange reserves.
Independent monitoring group OVD-Info says 756 people arrested across 37 cities, with about half of arrests in Moscow.
Kyiv regional police say Russian troops opened fire on the car of Brent Renaud and another journalist near the capital.
Ukraine's athletes came a remarkable second at the medals table, with China topping the count to claim 61 medals in all.
A full return of Iranian oil would have an effect, but does it give Tehran a major advantage in nuclear negotiations?
About 17 million people are placed under lockdown in the wake of worst COVID outbreak in two years.
The two are expected to discuss bilateral and international relations as well as the effects of the Russia-Ukraine war.
The talks are seen as the first step towards ending the rebellion in the African country.
Years of hitchhiking have taught me that there are a lot of good people in this terribly unjust world.
Russian troops launched multiple air attacks at the training ground near the western city of Lviv, local official said.
The UK government comes in for criticism for dragging its feet over Europe's biggest refugee crisis in decades.
Bibiana Martin was 12 years old when she joined the forest rangers. Twenty years later, she is still protecting animals.
Eighteen refugees still held as activists say the gov't is trying to deflect a 'burning issue' ahead of May elections.
As the Russia-Ukraine war enters its 18th day, we take a look at the main developments.
The move comes weeks after the two leaders' parties joined forces ahead of a general election in August.
Riyadh and Tehran previously said they hoped the talks could ease tensions but downplayed expectations of breakthroughs.
No casualties reported as a dozen missiles launched from outside Iraq hit northern Kurdish regional capital Erbil.
The humanitarian situation in the besieged city continues to deteriorate as satellite pictures show extensive damage.
