The United States is looking at whether Russia has violated a U.N. Security Council resolution on military dealings with Tehran by using an Iranian air base to carry out strikes inside Syria, the State Department said on Wednesday.

• August 18, 2016

Russia launched a second day of air strikes against Syrian militants from an Iranian air base, rejecting U.S. suggestions its co-operation with Tehran might violate a U.N. resolution as illogical and factually incorrect.

• August 17, 2016

Ukraine says it thinks Vladimir Putin is planning a new invasion, and it's not hard to see why: the Russian leader has built up troops on its border and resumed the hostile rhetoric that preceded his annexation of Crimea two years ago.

• August 16, 2016

Oil settled up nearly 2 percent on Tuesday, hitting five-week highs for a second straight day as sources at OPEC spoke of Saudi Arabia's apparent desire for higher crude prices while Russia met the producer group to discuss the market.

• August 16, 2016

Russia used Iran as a base from which to launch air strikes against Syrian militants for the first time on Tuesday, widening its air campaign in Syria and deepening its involvement in the Middle East.

• August 16, 2016

Germany's foreign minister urged Russia and Ukraine on Monday to reduce tensions over Crimea and stick to the troubled Minsk peace accords as a way of ending hostilities in eastern Ukraine.

• August 15, 2016

Russia's Economy Ministry has advised Prime Minister Dmitry Medvedev he would have to issue an unprecedented special decree if he wants to bar state-controlled oil major Rosneft (ROSN.MM) from the privatization of a mid-sized energy group, according to a letter seen by Reuters.

• August 15, 2016

A build-up of Russian military on Ukraine's border with the Crimean region, which has been annexed by Moscow, could reflect "very bad intentions," Ukraine's U.N. envoy warned on Thursday after the U.N. Security Council discussed the growing tensions.

• August 11, 2016