Islamic State has made a 'significant escalation' of its activities in the northeast of Syria.
said Russia's president, Vladimir Putin, according to the news agency dpa in a video conference with his præsidentkolleger from Iran and Turkey.
in addition to northeastern Syria, where the militant movement has been active, the situation remains fragile in the northwest region of Idlib, which lies close to the border with Turkey, says Putin.
Russia is allied with the syrian president, Bashar al-Assad. With Russian help Assad gained control over most of Syria.
Iran also supports Assad. Turkey to support certain rebel groups.
Putin has agreed with the Turkish president, Recep Tayyip Erdogan, and Iran's president, Hassan Rouhani, to continue to try to get a broad ceasefire in Syria.
It is clear from a joint statement of the three presidents after their videoconferencing.
They have also agreed to continue the fight against among other things the Islamic State. The three countries are trying to coordinate the effort.
Putin stressed at the meeting that the situation 'remains the most curious in areas outside the syrian government's control'. It shows a preview, as Russia's government has presented.
In the Idlib region, Turkey has created a kind of buffer zone. It is controlled by the Turkish army and rebel groups, who are supported by Turkey.
Erdogan describes as an attempt to create peace in the region. His critics see it as an action against the kurds.
- We will continue to do our best, that our neighbor Syria achieve peace, security and stability as soon as possible, " says Erdogan after Wednesday's videoconferencing.