Head of the North Atlantic Treaty Organization(NATO), Anders Fogh Rasmussen, has said that the use of chemical weapons in Syria cannot go unanswered."Any use of such weapons is unacceptable and cannot go unanswered. Those responsible must be held accountable," Rasmussen said in a statement after a meeting of NATO ambassadors in Brussels on Wednesday. He also claimed that the military alliance has received information suggesting that the Syrian government was behind last week's chemical attack near the Syrian capital, which killed hundreds. Rasmussen, however, refused to comment on a possible direct NATO involvement in any military action against Syria. His remarks came as the West appears to be moving toward taking military action against Damascus over allegations that it has used chemical weapons. Meanwhile, Syrian Prime Minister Wael al-Halqi has said that Israel, US and its allies are accusing the Syrian government of using chemical weapons in a bid to pave the way for a military action against Damascus. Halqi warned that Syria will turn into a "graveyard of the invaders" in case of a Western military intervention. He also said that the "colonialist threats" of Western powers "do not terrorize us because of the will and determination of the Syrian people, who will not accept being humiliated." Halqi also said that the West wants to turn Syria into a second Iraq and that the issue of chemical weapons use is only a pretext for war. The Syrian government has repeatedly said it was not involved in the poison gas attack near Damascus on August 21, which killed hundreds of people.