WASHINGTON (Reuters) - With the United States threatening to attack Syria, U.S. and allied intelligence services are still trying to work out who ordered the poison gas attack on rebel-held neighborhoods near Damascus.
No direct link to President Bashar al-Assad or his inner circle has been publicly demonstrated, and some U.S. sources say intelligence experts are not sure whether the Syrian leader knew of the attack before it was launched or was only informed about it afterward.
While U.S. officials say Assad is responsible for the chemical weapons strike even if he did not directly order it, they have not been able to fully describe a chain of command for the August 21 attack in the Ghouta area east of the Syrian capital.
It is one of the biggest gaps in U.S. understanding of the incident, even as Congress debates whether to launch limited strikes on Assad’s forces in retaliation.
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A declassified French intelligence report describes a unit of the SSRC, known by the code name “Branch 450”, which it says is in charge of filling rockets or shells with chemical munitions in general.
U.S. and European security sources say this unit was likely involved in mixing chemicals for the August 21 attack and also may have played a more extensive role in preparing for it and carrying it out.
“BEST EVIDENCE”
Bruce Riedel, a former senior U.S. intelligence expert on the region and sometime advisor to the Obama White House, said that intelligence about the SSRC’s alleged role is the most telling proof the United States has at hand.
“The best evidence linking the regime to the attack at a high level is the involvement of SSRC, the science center that created the (chemical weapons) program and manages it. SSRC works for the President’s office and reports to him,” Riedel said.
