Russia and Iran are continuing to send arms to the Syrian regime that can be used against protesters, a top State Department official said today.

According to Countryman, the Iranian weapons being funneled through the Syrian government to Hezbollah are not being used by Hezbollah inside Syria, but are being transferred to Hezbollah groups inside Syria's neighbor Lebanon.

Countryman also said the U.S. government is working with allies to try to get a handle on the stores of conventional, biological, and chemical weapons inside Syria, to prevent them from falling into the wrong hands if and when the Assad regime collapses.

There are "tens of thousands" of MANPADS - shoulder-fired missile systems -- in Syria and nobody really knows where they all are, Countryman said. Unlike Libya, Syria is not a signatory to the Chemical Weapons Convention, so there is no official reporting on its store of those weapons, but the effort to locate them is underway.