Syria moving chemical weapons components

US and allied intelligence have detected Syrian movement of chemical weapons components in recent days, a senior US defense official said on Monday, as the Obama administration strongly warned the Assad regime against using them.

A senior defense official said intelligence officials have detected activity around more than one of Syria's chemical weapons sites in the last week. The defense official spoke on condition of anonymity because he was not authorized to speak publicly about intelligence matters.

Secretary of State Hillary Rodham Clinton reiterated President Obama's declaration that Syrian action on chemical weapons was a "red line" for the United States that would prompt action.

"We have made our views very clear: This is a red line for the United States," Clinton told reporters. "I'm not going to telegraph in any specifics what we would do in the event of credible evidence that the Assad regime has resorted to using chemical weapons against their own people. But suffice it to say, we are certainly planning to take action if that eventuality were to occur."