"Limited progress" has apparently been made between the US and Russia over its military operations in Syria.
American Secretary of State John Kerry has spoken to his counterpart in Moscow on the phone, concerned groups other than Islamic State are being targeted.
Yesterday, US officials claimed four Russian missiles aimed at Syria had landed in Iran.
Russia has rejected those claims. The head of their defence forces said he would not comment on reports from anonymous US officials.
Syria's top general said on Thursday that the missiles hit targets in Raqqa and Aleppo in the north and Idlib province in the northwest.
In a rare televised statement, General Ali Ayoub said Russian strikes provided cover for government forces to launch an offensive against Islamic State fighters and other rebel forces.
State Department spokesman John Kirby says there was one clear message in the conversation:
