Russia has completed the delivery of an S-300 surface-to-air missile system to the Syrian military as part of new security measures following the downing of a Russian plane last month. Russian Defence Minister Sergi Shoigu on Tuesday said at a meeting of the country's security council...

A meeting between Defense Secretary Jim Mattis and his Chinese counterpart has been canceled, a US defense official said Monday, amid rising tensions between the two nations. The Pentagon had been working on a plan for Mattis to travel to Beijing later this month to meet General Wei...

Russia said Monday it would equip Syria with sophisticated air defense systems, a move that could worsen a rift with Israel by limiting its ability to bomb across its northern border. Defense Minister Sergei Shoigu said Moscow would send Russia’s powerful S-300 ground-to-air missile...

Israel must provide Moscow with more information about the downing of a Russian military aircraft near the Syrian coast earlier this week, Russia's Foreign Ministry said in a statement Thursday, the Interfax news agency reported. Fifteen Russian crew were killed when the IL-20...