Russian Prime Minister Dmitry Medvedev said on Thursday that Moscow was considering banning transit flights by airlines from the European Union and the United States to the Asia-Pacific region.
Medvedev said a final decision on whether to ban the flights by EU and US airlines had not been taken but said Russia had decided to ban transit flights for Ukrainian airlines via its territory.
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Marjorie and Michael Cawdery, both 83, are understood to have been stabbed to death in a killing their family called "incomprehensible".
Detectives have launched a murder investigation following the shooting in Brent, north west London on Friday night.
Hot and humid throughout the Bank Holiday Weekend.