Washington: Syria has conducted a chemical weapons test during the past 15 months, US Defence Secretary Donald Rumsfeld charged on April 14.

"We have seen a chemical weapons test in Syria over the past 12, 15 months," he said in response to Syrian denials that it has chemical weapons.

Rumsfeld said the United States also has intelligence that Syria has allowed Syrians and others enter Iraq with arms and leaflets indicating that they would be rewarded for killing Americans.