Turkey threat to invade northeastern Syria to avenge Istanbul attack?

Turkey’s president again hinted at a possible new ground offensive in Syria against Kurdish militants on Tuesday, as Syrian forces denounced new airstrikes and Russia urged restraint and called on Ankara to avoid an escalation.

At least 12 people were killed in Turkey’s largest air attack on Syria and Iraq in a long time.

Turkey says it’s retaliating for the Istanbul bombing it says was done by Syria-based YPG.

Meanwhile, Iran is also threatening to invade Kurdish areas in northern Iraq.