Russian PM Dmitry Medvedev has blamed the strengthening of terrorist group Islamic State on “irresponsible” US policies in the Middle East, calling for all nations to stop attempting to destabilize the situation in sovereign countries for their own purposes.

“Instead of concentrating their common efforts on fighting terrorism, the United States and their allies have started to oppose Syria’s legally-elected president, Bashar Assad,” Dmitry Medvedev was quoted as saying by TASS.