Two months of US-led airstrikes have failed to weaken IS militants, Syrian Foreign Minister Walid al-Moualem has said.
Moualem told Lebanese TV the only way to tackle IS was to force Turkey to tighten border controls and stop foreign fighters crossing into Syria.
He also said Turkey’s plan for a no-fly zone over northern Syria would a de facto partition of Syria, the BBC reported.
“All the indications say that (IS) today, after two months of coalition air strikes, is not weaker,” Moualem told al-Mayadeen TV on Friday.
“If the (UN) Security Council and Washington do not force Turkey to control its borders then all of this action will not eliminate IS,” the minister added.
Turkey has a 900km (560 miles) border with Syria.
Ankara has repeatedly denied claims that it backing extremist militant groups - inadvertently or otherwise - to help Syrian insurgents oust Syrian President Bashar al-Assad.
