US Secretary of State John Kerry has urged allies to intensify the fight against Daesh (ISIL) amid Washington’s ongoing campaign against the Takfiri terrorists.

"I called on every NATO ally to step up support in the fight against Daesh (ISIL), striking at the organization's core in Syria and Iraq," said Kerry on Wednesday after a meeting of foreign ministers from the 28 NATO states in Brussels.

"A number of allies are already bringing more to this battle or are planning to increase their contributions," he added.

Kerry also thanked British Prime Minister David Cameron for his efforts to convince the Britain's parliament to vote in favor of British military joining the US-led bombing campaign against Daesh in Syria as the country’s attacks are currently being conducted only in Iraq.

"We are very pleased with efforts by Prime Minister Cameron to go to parliament," Kerry said. "It is a very important step. We applaud his leadership."

The United States has already deployed dozens of ground troops to Syria claiming they will assist Kurdish forces in their battle against Daesh (ISIL) terrorists.

On Tuesday, Defense Secretary Ashton Carter said the US is "prepared to expand" the role of Special Operations Forces in Syria.

On October 30, senior Obama administration officials said that Washington would send some 50 special forces to Syria to "train, advise and assist" militants fighting against the Daesh, in an apparent breach of Obama's promise not to put US “boots on the ground" there.

Kerry also rejected the idea that NATO is posing any threat to Russia, saying "NATO is not a threat to anybody ... not an offensive organization, not focused on Russia per se. I would say to Russia and any other country -- this is not focused on them specifically."

Russia and NATO have been at odds over a series of issues relating to their borders in recent years including the crisis in Ukraine as well as Moscow's support for Syrian President Bashar al-Assad in his fight against Daesh.