Western officials suspect Iran's switch to producing specialized civil nuclear fuel may be a negotiating tactic, raising concerns over undeclared sites and lack of cooperation with inspectors.

Western officials suspect Iran's switch to producing specialized civil nuclear fuel, reducing its stockpile of near bomb-grade uranium, could be a negotiating tactic. The move raises concerns about other aspects of Iran's nuclear program, including undeclared new sites and lack of cooperation with international inspectors, despite the visible reduction in stockpile.