The two countries sign a 20-year treaty covering areas ranging from defence and technology to energy and trade.
Four Britons have died after contracting gut infections on the archapeligo since last year....
The Ukrainian president also said a large number of people were "officially missing", meaning the total death toll is thought to be much higher....
Italy has foiled "Russian origin" cyber-attacks targeting the Winter Olympics, says Foreign Minister Antonio Tajani....
Airport organisation says queues could last up to six hours over the summer holidays...
Russia's gains on the battlefield have forced Natalia to rebury her husband....
Emails released by the US government suggest the late convicted sex offender Jeffrey Epstein planned to use the visa to meet young women in Moscow....
The group are cleared of aggravated burglary over a raid at an Elbit Systems warehouse....
The New Start treaty has limited the number of deployed strategic nuclear warheads for both countries....
Novo Nordisk is facing "unprecedented" price pressures, "intensifying competition" and patents expiring....
Ukraine's leader says regions including Kyiv and Kharkiv are among those suffering the most from blackouts as a result of recent attacks....
BBC Sport finds evidence raising questions over the neutral eligibility of four Russian athletes....
An independent review made 130 recommendations - including creating a new criminal justice adviser to the PM - to improve the efficiency of the system....
BBC Senior international correspondent Orla Guerin joined a special operation over Colombia's cocaine heartland, tasked with destroying crude cocaine labs hidden deep in the jungle....
The attack - which reportedly consisted of more than 70 missiles and 450 drones - comes after a so-called "energy truce" expired at the weekend....
Ukraine's sports minister calls Gianni Infantino "irresponsible" and "infantile" for saying Fifa will look at lifting a ban on Russia....
Nottingham Forest sign defender Luca Netz from Borussia Monchengladbach on a four-and-a-half-year contract....
An election for a state Senate seat has unnerved Republicans, after the Democratic candidate delivered a surprise win....
Tariffs will drop from 50% to 18% on Indian goods, while India has agreed to stop buying Russian oil....
Starlink-enabled drones have been linked to a number of recent deadly attacks by Russia on Ukraine....
Fifteen others were reported injured in the strike near a bus carrying the workers on Sunday....
The BBC's Russia editor reflects on the difficulties of working as a British journalist in Moscow....
The US signals that restoring democracy is no longer a priority and it is ready to work with Burkina Faso, Mali and Niger....
Trump earlier said Iran - which is due to begin a live-fire naval exercise in a key shipping route - was in "serious discussions"....
Residents in the Ukrainian capital are finding joy in unusual places, despite power cuts caused by Russian attacks and freezing winter temperatures....
Already facing electricity cuts, civilians are struggling to keep warm in their own homes as temperatures are set to plummet....
Revelations from newly released documents related to Jeffrey Epstein dominate Saturday's papers....
The exchange emerges in the latest, wider batch of documents released by the US justice department....
A team of divers are tasked with de-mining parts of the Black Sea still under Ukraine's control....
Opinion is divided over whether Warsh will align with the US president's views over how the Federal Reserve should be run....
António Guterres says the international body could run out of money by July due to members' unpaid fees....
