(Associated Press) Technicians upgrading Iran’s main uranium enrichment facility have tripled their installations of high-tech machines that could be used in a nuclear weapons program to more than 600 in the last three months, diplomats said Wednesday.

They say the machines are not yet producing enriched uranium and some may be only partially installed. Still the move is the latest sign that 10 years of diplomatic efforts have failed to persuade Tehran to curb its uranium enrichment. Instead, Iran continues to increase its capacities.

The installations also suggest that Iran possesses both the technology to mass-produce centrifuges that can enrich much faster than its present machines and the ability to evade international sanctions meant to keep it from getting materials it needs to do so.

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