Islamic State militants battled rival insurgent groups on Wednesday north of the city of Aleppo, where officials say the Syrian army is preparing an offensive of its own backed by Iranian soldiers and Russian jets. A rebel fighter and a group monitoring the war said Islamic State...

The U.S. and Russian militaries are finalizing a memorandum of understanding that sets out basic air safety procedures in the skies above Syria, a U.S. official said after the latest round of talks between the former Cold War foes on Wednesday. Russia's entry into Syria's civil...

A Russian fighter jet came into close proximity with a U.S. air force jet over Syria on Oct. 10 to identify it, "not to scare it", Russia's state ITAR-TASS news agency quoted the defense ministry as saying on Wednesday. The ministry said its SU-30CM jet was within 2-3 kilometres of the U.S....

 Turkish President Recep Tayyip Erdogan on Tuesday ordered a special state probe into possible shortcomings over the Ankara bombings which killed 97, saying intelligence indicated the attack had its origins in Syria. Ergodan -- who has come under fire over alleged security lapses -- broke...