Turkish Prime Minister Recep Tayyip Erdogan turned on the Syrian government on Friday, accusing President Bashar al-Assad of failing to take the violence seriously.
An estimated 3,000 Syrian refugees have fled to Turkey following a widening military crackdown on anti-regime protests.
Erdogan told Turkish television that Syria’s intelligence service was “heading towards a massacre.”
“The UN Security Council could get involved and it is already preparing a case against the regime,” he said. “After all that has happened, Turkey can no longer defend Syria.”
Syrian activists said that at least 21 people had been killed after Friday prayers as demonstrations were again held across the country.
The protesters want President al-Assad to step down, as well as democratic reforms and freedoms.
The president took power when his father died 11 years ago.