Syria accused the West of lacking the "true will" necessary to confront terrorism in the region, criticizing the US-led coalition that has vowed to crush the Islamic State (IS) armed group, according to the state news agency SANA.

"The US and Western move to form an alliance outside the framework of the UN Security Council to fight the Islamic State does not reflect a true will to confront terrorism," Syria's Parliament Speaker Jihad al-Laham said on Sunday in a speech during a People's Assembly session.

The same countries that are joining the international coalition are the ones that participated in arming and financing the militant groups in Syria, he added, referring to the Arab Gulf states, like Saudi Arabia, that have openly expressed their support for the armed rebellion in Syria and have recently joined the international effort to fight against the Islamic State.

Al-Laham also denounced the superpowers for rejecting Damascus' offer for joint cooperation on targeting IS positions with airstrikes on Syrian soil.

"Are there any sane persons who could think about fighting terrorism without cooperation with the countries which are exposed to it?" he said.

Whoever truly wants to fight terrorism must learn from Syria and its army, the speaker said, adding they should also cooperate with the Syrian government according to a long-term plan.

Following the shocking advancements of the Islamic State and other armed Islamist groups in Iraq and Syria, major world powers have rallied the international community to fight against the militants, saying they pose a threat to not just region but to Western interests.

The UN Security Council adopted a resolution recently authorizing world powers to take action against those who support the Islamic State and the al-Qaida-linked Nusra Front. The resolution was quickly followed by a US appeal to form an international coalition.

Last week, US President Barack Obama authorized the US air force to strike IS positions in Syria, similar to the airstrikes American war jets have been carrying out in Iraq. But the strikes lack coordination with the Syrian government, a move that was deemed by Damascus as "an encroaching upon Syrian sovereignty."

US Defense Secretary Chuck Hagel on Thursday defended President Obama's strategy against the IS but offered no new details on the coalition the administration is forming.

The US House of Representatives on Wednesday voted to back Obama's plan to train and arm vetted members of the "moderate" Syrian opposition, while the president excluded the use of ground troops.

Syria has slammed plans that exclude Damascus, as well as the idea of arming and training the Syrian rebels, claiming that there are no "moderate" rebels fighting in Syria and that the vast majority of them are fighting with an array of radical militant groups.

Meanwhile, the US lawmakers are keen to form a broad international coalition that includes Arab countries to allay concerns the coalition has a solely Western face.

"More than 40 nations have already expressed their willingness to participate in this effort, and more than 30 nations have indicated their readiness to offer military support," Hagel told lawmakers at a House Armed Services Committee hearing.