DAMASCUS, Syria (CNN) -- Syria's foreign minister struck a defiant tone Tuesday amid growing international calls for a military response to the country's suspected use of chemical weapons, denying his nation is hindering inspectors and warning Western leaders against an attack.
"Syria is not easy to swallow," Foreign Minister Walid Moallem said Tuesday at a news conference. "We have the materials to defend ourselves. We will surprise others."
Days after the United States moved warships armed with cruise missiles into the region, U.S. Secretary of Defense Chuck Hagel told the BBC on Tuesday that forces were ready to carry out a strike if ordered.
"The options are there, the United States Department of Defense is ready to carry out those options," Hagel told BBC
"We are ready to go, like that," he said, referring to the military's capability to carry out a strike immediately.
A senior Defense Department official told CNN that any strike could be completed "within several days."
As U.S. officials turned up the volume on a military response, a NATO spokesman said the military alliance was "closely monitoring developments" and British Prime Minister David Cameron's office recalled lawmakers from their summer vacation Tuesday to vote on his own country's response to the alleged chemical attack.
His office also said the country's military was making contingency plans for a Syrian operation, joining U.S. officials who said Monday that President Barack Obama's administration was evaluating options for a military response to the suspected use of chemical agents against the Syrian rebels. Obama has yet to decide how to respond, the defense official said Tuesday.
Rebel officials say more than 1,300 people -- including many children -- died in such an attack. Syrian officials blame rebels for the deaths.
An intelligence report detailing evidence of the alleged attack could be released as early as Tuesday, a U.S. official told CNN. The report will include forensic evidence and intercepted communications among Syrian military commanders, the official said.
While stopping short of directly accusing Syrian President Bashar al-Assad's government of a massacre, U.S. Secretary of State John Kerry on Monday called chemical weapons use a "moral obscenity" and said Syrian actions are "not the behavior of a government that has nothing to hide."
"We know that the Syrian regime maintains custody of these chemical weapons. We know that the Syrian regime has the capacity to do this with rockets. We know that the regime has been determined to clear the opposition from those very places where the attacks took place," he said.
Meanwhile, he said that Syria was "systemically destroying evidence" of last week's attack by continuing to shell the area. And he said sniper fire Monday that damaged a vehicle being driven by a team of United Nations weapons inspectors "only further weakens the regime's credibility."
Moallem rejected the accusations.
"They said the Syrian forces are the ones who used this weapon," he said. "And I categorically denied this matter. I said there is no country in the world that uses weapons of mass destruction against its people. If anybody who has got any evidence, who can accuse our forces that they used this kind of weapon, I dare them to bring it out to the public."
He said rebel forces were to blame for security concerns near the suspected chemical sites and argued Western leaders were using claims of chemical weapons use as an excuse to go after the Assad regime.
"We all hear the drums of war," he said. "They want to attack Syria. I believe to use chemical weapons as a pretext is not right."
Russia objects, again
Syrian ally Russia also cast doubt on the accusations.
The Russian Foreign Ministry on Tuesday accused the United States of trying to "create artificial groundless excuses for military intervention" in Syria.
In a statement, the ministry complained that Washington was attempting to bypass the U.N. Security Council to take action on the reported chemical attack.
Russia is an ally of Syria's president and has a permanent seat on the council. It is capable of blocking measures against his government that are proposed to the U.N. body.
Moscow also bemoaned the postponement by the United States of a meeting that was scheduled for Wednesday in The Hague, where top diplomats from both countries had planned to discuss the war in Syria.
Russia's foreign minister, Sergey Lavrov has said that there is no proof yet that the Syrian government was involved in last week's reported attack. His office has compared the Western allegations against Syria to the claims that Iraq was hoarding weapons of mass destruction before the U.S. invasion in 2003 -- claims that fell apart once American troops began searching for them.
U.N. inspections delayed
U.N. inspectors had been expected Tuesday to head to Ghouta to look for evidence of chemical weapons use. But Moallem said