Vladimir Putin has discussed working with international "partners" to take on Islamic State militants, according to Russian media.
The Russian president was reported to have talked about the issue with his Security Council today.
Kremlin spokesman Dmitry Peskov would not say which countries Russia may be willing to work with.
President Francois Hollande said French fighter jets will soon strike against Islamic State militants in Iraq once reconnaissance missions have identified targets.
When asked when French airstrikes in Iraq would begin, he told a news conference: "As soon as we have identified targets, that means in a short time frame.
"It will be air support to protect Iraqi soldiers and Kurdish Peshmerga forces to reduce and weaken this terrorist group."
Did Philip Hammond misspeak or did he reveal the thinking at the highest levels of government on military action in Syria?
President Obama - a leader who thought his legacy would be ending two conflicts - has plunged the US into the maelstrom of two civil wars.
A social media campaign imitating the popular Ice Bucket Challenge has gone viral. Its target is Islamic State.