Russia's Prime Minister Dmitry Medvedev (L) meets with Transport Minister Maxim Sokolov and Aeroflot Deputy General Director Vadim Zingman (not pictured) at the Gorki state residence outside Moscow
 
Reuters/Moscow

Russian Prime Minister Dmitry Medvedev threatened on Tuesday to retaliate for the grounding of a subsidiary of national airline Aeroflot because of EU sanctions, with one newspaper reporting that European flights to Asia over Siberia could be banned.
Low-cost carrier Dobrolyot, operated by Aeroflot, suspended all flights last week after its airline leasing agreement was cancelled under European Union sanctions because it flies to Crimea, a region Russia annexed from Ukraine in March.
"We should discuss possible retaliation," Medvedev said at a meeting with the Russian transport minister and a deputy chief executive of Aeroflot.
The business daily Vedomosti reported that Russia may restrict or ban European airlines from flying over Siberia on Asian routes, a move that would impose costs on European carriers by making flights take longer and require more fuel.
Vedomosti quoted unnamed sources as saying the foreign and transport ministries were discussing the action, which would put European carriers at a disadvantage to Asian rivals but would also cost Russia money it collects in overflight fees.
Shares in Aeroflot - which, according to Vedomosti, gets around $300 million a year in fees paid by foreign airlines flying over Siberia - tumbled after the report.