Moscow/Beirut (dpa) - One hundred and sixty Russian citizens fighting for the terrorist group Islamic State in Syria have been killed, a Russian deputy foreign minister said on Thursday, amid stepped-up international military action in the war-torn country. "At the present time, there are more than 25,000 foreign terrorist militants fighting under the banner of Islamic State, including from Arab countries, Europe, Russia and the Commonwealth of Independent States [a bloc of post-Soviet republics]," Oleg Syromolotov said, quoted by state news agency TASS. He added that 2,719 Russian citizens had gone to fight for the Islamist militia in Syria. "One...