The Russian Defense Ministry said on Sunday that 10 Islamic State positions in Syria had been attacked in the past 24 hours, including militant training camps in Raqqa and Idlib provinces. Russian strikes have broken "the management and logistics of the terrorist organization" and caused "significant damage to the infrastructure used for preparation of terrorist attacks," the ministry said on its website. Laser-guided and concrete-piercing ordnance had been used, it said.

The Russian military's direct entry into Syria's civil war last week in support of its ally, President Bashar al-Assad, has stirred anger in the U.S., Europe and Middle East, where leaders accuse Moscow of targeting western-backed rebel forces opposed to Assad as well as the jihadists of Islamic State.