Guerra Turquia-Síria?

Turkey shells pro-regime forces in Afrin: Syria state media (Nalia Radio and Television):

Turkey fired at Syrian pro-regime forces as they entered Tuesday (February 20) the Kurdish-controlled enclave of Afrin, Syrian state media said.

The shelling marks a major escalation in the month-old assault Turkey and allied rebels are waging on Afrin. 

"Turkish regime forces targeted the locations of popular forces with artillery fire as they arrived to the Afrin region," state news agency SANA reported. 

Turkey said they it fired "warning shots" at Syria pro-regime forces in Afrin. (...)

In a statement on Tuesday, YPG spokesman Nuri Mahmud said the Kurdish forces had called on the Damascus government to help fend off Turkey's assault. 

"The Syrian government responded to the invitation, answered the call of duty and sent military units today, February 20, to take up positions on the borders, and participate in defending the territorial unity of Syria and its borders," the statement said.