Russian airstrikes

Russian Defence Ministry Igor Konashenkov said in televised comments that Russian aircraft have damaged or destroyed 12 targets in Syria belonging to the Islamic State group including a command centre and two ammunition depots.

Officials acknowledged, however, that other unidentified groups were being targeted as well.

Carter made the comment at a Pentagon news conference, where he offered few details about the strikes but said they point out a contradiction in Russia's approach. He said the Russians should not be supporting Syrian President Bashar Assad's government.

Carter also expressed disappointment that the Russians did not use formal channels to provide the U.S. with advance notice of its airstrikes.