Tens of thousands of Syrian refugees are moving to Turkey’s border to flee heavy fighting near the city of Aleppo, officials and activists have said.
Turkish Prime Minister Ahmet Davutoglu said up to 70,000 might be heading to the border, while a monitoring group put the number at about 40,000.
Intense Russian air strikes have helped Syria’s government troops make advances near the country’s largest city.
Meanwhile, Russia accused Turkey of preparing an invasion into Syria.
Also on Thursday, a Saudi military spokesman said the country was ready to send ground troops to Syria to fight the so-called Islamic State group.