The information the U.S. showed Moscow trying to prove that the Syrian regime was behind an alleged chemical weapons attack is �absolutely unconvincing,� Russia�s foreign minister said Monday.

The United States insists Syrian President Bashar Assad�s troops were behind the chemical attack on Aug. 21, which they say killed over 1,400 people, and is considering strikes against his regime. Moscow is Assad�s key ally and weapons supplier, and its protector at the United Nations.

Speaking at Russia�s top diplomatic school, Sergey Lavrov said the evidence Washington presented was not detailed.

�Yes, they showed us some findings but there was nothing specific there: no geographic coordinates, no names, no proof that the tests were carried out by the professionals,� Lavrov said. He did not say what tests he was referring to.

�What our American, British and French partners showed us in the past and have showed just recently is absolutely unconvincing,� Lavrov said. �And when you ask for more detailed proof they say all of this is classified so we cannot show this to you.�

(AP)