Syria's Foreign Minister Walid al-Moallem on Monday said the Syrian army forces are ready around Idlib if the terror-designated groups refused to pull out of the demilitarized zone.
Speaking in a press conference in Damascus with his Iraqi counterpart Ibrahim al-Jaafari, al-Moallem warned that there will be other options if the terror-designated groups rejected to abide by the demilitarized zone deal in northern Syria.
He said Idlib province, like any other Syrian area, will definitely return under the government control.
He said if the demilitarized zone deal, which was reached by Russia and Turkey last month, is not implemented, Syria will have other options.
His remarks came as the al-Qaida-linked Nusra Front and its umbrella of the Hayat Tahrir al-Sham rejected to withdraw from the planned demilitarized zone in northern Syria.
On Sunday evening, the al-Qaida-linked group said in a statement for the first time in response to the deal that it will continue to fight the government forces.
The Syrian Observatory for Human Rights said none of the extremist groups left the demilitarized zone as they were supposed to evacuate by Oct. 15 in accordance with the Russian-Turkish deal to establish a buffer zone in certain areas in northern Syria.
The UK-based watchdog group said that cautious calm prevailed the demilitarized zone on Monday.
It added that the jihadi groups control 70 percent of the demilitarized zone.
The planned demilitarized zone stretches from the northeastern countryside of Latakia province to the northern countryside of the province of Hama and western countryside of Latakia as well as areas in the countryside of Idlib province in northwestern Syria.
The Tahrir al-Sham, or Nusra Front, is considered as the most powerful among the rebel groups in Idlib Province, which is the last major rebel stronghold in Syria.
In his remarks Monday, al-Moallem said the Nusra Front must be rooted out from Idlib because it's a terrorist group.
He said the government has been prioritizing the reconciliation deals to finish the situation in Idlib out of concern for the lives of civilians in that province, where 3.5 million people live.
He, however, noted that "we cannot stand indifferent about the current situation in Idlib if Nusra Front refused to abide by the agreement."
While hinting that no military action is imminent, al-Moallem said: "We have to wait, but the Syrian Army is ready in the vicinity of Idlib."
The withdrawal of the extremist groups from the buffer zone is the second step of the Russian-Turkish deal to establish such a zone in northern Syria.
The rebels have withdrawn their heavy weapons recently but the fighters didn't.
The deal was reached in September between the leaders of Turkey and Russia, aiming at averting Idlib province, which is the last major rebel stronghold in Syria, a wide-scale offensive by the Syrian Army.
The Syrian government has welcomed the deal but noted that it was temporary not a permanent one.
An airstrike by the U.S.-led coalition fighting the Islamic State group targeted a mosque in Syria last week because it was determined to be an insurgent command-and-control center, the U.S. said Sunday.
The coalition said in a statement that while the law of war protects mosques, the use of the building as a headquarters by IS caused it to lose that protected status. It said a dozen fighters were killed.
U.S. Army Gen. Joseph Votel, the top American commander for the Middle East, said Sunday that he is very satisfied that commanders went through the proper procedures to determine that the mosque was being used by IS and that it was a legitimate target.
"The determination that was made by the leadership on the ground that this was this mosque was not being used as a mosque," Votel told reporters traveling with him in Qatar. "These aren't hastily made decisions."
Syrian state media and the Britain-based Syrian Observatory for Human Rights said last week that a series of strikes in Sousa near the Iraq border killed and wounded dozens; civilians as well as IS fighters.
The coalition's statement, focused on the mosque, said monitoring of the building "made us aware" of when only IS fighters were present. It said the strike took place Thursday when it was being used to coordinate attacks on the coalition and on U.S.-backed Syrian Democratic Forces.
Sousa is in the last IS-held pocket in Syria and Syrian Democratic Forces have been on the offensive for weeks trying to clear the area of the extremists.
The statement did not acknowledge or refute the reports of civilian deaths from coalition airstrikes in the area. "We conduct inquiries into all credible allegations of civilian casualties," it said.
IS fighters recently stormed a settlement for displaced people in the area and kidnapped 130 families.