By Louis Charbonneau
UNITED NATIONS (Reuters) - The opposition Syrian National Coalition on Wednesday denied Russian allegations that rebel fighters fired a projectile laden with the nerve agent sarin at a suburb of Aleppo in March, saying U.N. inspectors should be allowed to investigate the attack.
Separately, a Western diplomat said senior U.N. officials would head to Damascus soon to discuss ways of breaking the deadlock on access for a U.N. chemical weapons investigation team that has so far been unable to visit Syria.
"The Free Syrian Army strongly condemns all usage of chemical weapons against a civilian population and denies Russia's allegations about the FSA using chemical weapons in Khan al-Assal, Aleppo," Khalid Saleh, a spokesman for the coalition, said in a statement.
"Only the Assad regime has the know-how, capability and willingness to use these weapons," Saleh said, referring to Syrian President Bashar al-Assad.
"The coalition and supreme military council have asked for the U.N. monitors to come to Syria to investigate the use of these weapons and the Assad regime refuses to allow them to do so," he said.
Russia's U.N. envoy Vitaly Churkin on Tuesday said Russian scientific analysis strongly indicated a projectile containing sarin that hit Khan al-Assal on March 19, killing 26 civilians and military personnel, was fired by rebels.
The government and rebels have blamed each other for that incident, as well numerous other alleged chemical attacks. Both sides deny using chemical weapons themselves.
"The usage of chemical weapons is inconsistent with the guiding principles and goals of the Syrian revolution," Saleh said. "Targeting civilians indiscriminately to achieve political gains is a common characteristic of the Assad regime."
Russia, along with Iran, is Syria's closest ally and chief arms supplier. The United States has cast doubt on the Russian analysis of the Khan al-Assal incident and, along with France, called for full U.N. access to Syrian sites where chemical weapons use was suspected.
CHEMICAL PROJECTILE FELL SHORT?
Speaking on condition of anonymity, a senior Western diplomat also expressed skepticism about the Russian claim that the rebels were behind the Khan al-Assal attack.
He dismissed the idea that Assad's government was willing to let the U.N. team investigate Aleppo because it was certain the rebels were responsible for the March 19 chemical attack. He said available evidence suggested the Syrian army carried out the attack.
"What they hope will be discovered there is lots of soldiers who were poisoned by chemical weapons, which is true," the envoy said. "But our information suggests that that was because the projectile ... fell short and landed in an area where there were Syrian troops, not that the opposition had done it."
Churkin said Russian experts visited the location where the projectile struck and took their own samples of material from the site. Those samples, he said, were then analyzed at a Russian laboratory certified by the Organization for the Prohibition of Chemical Weapons.
He also said that the projectile was not a standard military weapon.
So far, chief U.N. chemical weapons inspector Ake Sellstrom's team has not traveled to Syria because of diplomatic wrangling over the scope of access he would have there.
U.N. Secretary-General Ban Ki-moon wants Sellstrom to have unfettered access to investigate all credible alleged chemical attacks while Assad's government wants the U.N. experts to confine their investigation to the March 19 incident. That disagreement has caused a deadlock in talks between the United Nations and Syria on access for the inspection team.
Syrian U.N. Ambassador Bashar Ja'afari on Monday said his government has invited Sellstrom and U.N. disarmament chief Angela Kane to Damascus to discuss allegations of banned arms use in Syria's two-year civil war but suggested it would not compromise on access.
The senior Western diplomat said Sellstrom and Kane were expected to accept the invitation and travel to Damascus soon to discuss ways of breaking the deadlock.
(Reporting by Louis Charbonneau; Editing by Vicki Allen)