Calls for his immediate release have come from European Commission President Ursula von der Leyen, British Foreign Secretary Dominic Raab and top officials of other EU nations.

Here is some information about Russia's possible motives for such an attack, and details about Russian cyber offensive and information warfare capabilities.

The aircraft is designed to serve as a mobile command centre during a nuclear exchange.

The Russian-designed vaccine has yet to complete the advanced studies needed to ensure its effectiveness and safety in line with established scientific protocols.

The settlement -- called Karvachar in Armenian -- is legally part of Azerbaijan, but it has been under the control of ethnic Armenians since the 1994 end of a war over the Nagorno-Karabakh region.

Syria's nine-year war has killed about a half-million people, wounded more than a million and forced about 5.6 million to flee abroad as refugees, mostly to neighbouring countries.

The Russian president is one of a handful of world leaders who have not commented on Biden's victory, which was called by major news organizations on Saturday.

Erdogan previously said Turkey and Russia could work together to solve the conflict.

The request came as Azerbaijani troops pushed deeper into Nagorno-Karabakh and both sides accused each of breaking a mutual pledge not to target residential areas hours after it was made.

Several hundred women marched across the capital of Belarus in heavy rain Saturday to demand the resignation of the country's authoritarian president, continuing more than 2 1/2 months of protests against his challenged reelection to a sixth term.