WASHINGTON ― A high-level defector has provided a disturbing new account of Syrian chemical weapons operations ― including an allegation that some of these weapons have been moved since Russia proposed an international monitoring scheme to destroy the toxic munitions. 

The revelations came in a lengthy telephone interview Sunday with Brig. Gen. Zaher al-Sakat, who was a chemical-weapons specialist for the Syrian army until he defected to the rebels in March. Sakat spoke by Skype from a city in Jordan.

U.S. officials appear skeptical of allegations that chemical weapons have been moved outside Syria, to Iraq or Lebanon, as claimed by Sakat and others. So it’s best to treat those reports with caution. But Israeli officials are said to believe that the Syrian regime has been moving weapons inside the country to areas of greater regime control, for reasons of security or, perhaps, concealment.

Sakat’s most compelling information was his account of being ordered to use the toxic chemical phosgene in the Deraa area of southern Syria last year. The defector said that at the time, he supervised chemical weapons for the Syrian Army’s Fifth Division, based in Deraa, a stronghold of rebel support.

Sakat was summoned in October 2012 by his commander, whom he named as Maj. Gen. Ali Hassan Ammar, and told to use phosgene to attack a region north of Deraa that included the villages of al-Sheikh Maskin, al-Hrak and Buser al-Harir.

Sakat said that according to standard procedures, any such order for using toxic gas would have originated with top military and intelligence commanders, who make up what he called the “crisis management cell.” The chain of command passes through Gen. Jamil Hassan, the chief of air force intelligence, whose bases Sakat said are often used to store the chemical stocks. The chain then passes to a group known as Unit 450, which coordinates logistics for chemical weapons, and to individual geographic commands, such as Unit 416 for Aleppo and Unit 417 for Damascus.

When handling the weapons, Sakat said he was instructed to use a simple word-substitution code, known as the “Khaled 4” template. An order to transport, say, sarin gas to a particular place would be conveyed with a phrase such as “Go bring the milk to Mohammed.”

Sakat, a Sunni Muslim, said he didn’t want to carry out the orders to use phosgene against civilians. So he said he dug a pit and buried the odorless toxic gas and dispersed a non-toxic substitute that was mostly a bleach-like compound. But his commanders thought he had performed the mission as ordered.

After the feigned attack, Sakat said he was summoned by his commander, Ammar, who wasn’t aware of the sabotage and who proclaimed to a group of senior officers: “This is our hero who launched the chemical attack.” Sakat named a half-dozen Syrian officers who were present to hear this accolade.

It’s impossible to verify Sakat’s claim that the regime during the past two weeks has sent chemical weapons east toward Iraq and west toward Lebanon. Sakat said planning for these movements began just before Russian Foreign Minister Sergei Lavrov’s Sept. 9 proposal for international control of Syrian chemical weapons, when Hafez Makhlouf, the Syrian chief of intelligence, met with representatives of Iranian and Iraqi intelligence at a location in the Yafour district of Damascus.

Soon after the meeting, Sakat said, rebel intelligence sources spotted a convoy of specialized Mercedes and Volvo trucks moving east from Homs toward a village near Syria’s border with Iraq. The intelligence was provided by Syrian army defectors and an operative known as “Abu Mohammed the Octopus,” who briefly joined us by phone.

Sakat charged that another possible transfer of chemical weapons was made by a convoy of 22 trucks from Mezzeh military airport, southwest of Damascus, toward Lebanon. Just before reaching the frontier, the trucks veered north to the village of Kfer Yabous and then west along a smuggler’s route said to be used by Hezbollah. There’s reason to be skeptical that this transfer took place, since it could probably be monitored by Israel and would immediately make Hezbollah a target for attack.

Sakat said chemical weapons had also been transferred recently to four other locations inside the country, but he didn’t identify them.

In a separate Skype conversation Sunday, a Syrian source inside the country said that chemical weapons equipment had been moved recently from the Bahous Center for Scientific Research, in the area known as Barzeh, northeast of Damascus. The source said he didn’t know the destination.

By David Ignatius

David Ignatius’ email address is davidignatius@washpost.com. ― Ed.

(Washington Post Writers Group)