The French secret service is believed to have refused to allow MI6 to give the Americans "credible" intelligence showing that Iraq was trying to buy uranium ore from Niger, US intelligence sources said yesterday.

MI6 had more than one "different and credible" piece of intelligence to show that Iraq was attempting to buy the ore, known as yellowcake, British officials insisted. But it was given to them by at least one and possibly two intelligence services and, under the rules governing cooperation, it could not be shared with anyone else without the originator's permission.

US intelligence sources believe that the most likely source of the MI6 intelligence was the French secret service, the DGSE. Niger is a former French colony and its uranium mines are run by a French company that comes under the control of the French Atomic Energy Commission.

A further factor in the refusal to hand over the information might have been concern that the US administration's willingness to publicise intelligence might lead to sources being inadvertently disclosed.

US sources also point out that the French government was vehemently opposed to the war with Iraq and so suggest that it would have been instinctively against the idea of passing on the intelligence.[...]