After receiving independent confirmation of the steps from the United Nations watchdog, the International Atomic Energy Agency, EU foreign ministers in Brussels approved the partial sanctions suspension.
The White House also announced the suspension of some American sanctions on Iran.
"These actions represent the first time in nearly a decade that Iran has verifiably enacted measures to halt progress on its nuclear program, and roll it back in key respects," White House press secretary Jay Carney said in a statement.
He said Iran is also providing U.N. inspectors with increased transparency, including more frequent and intrusive inspections. "Taken together, these concrete actions represent an important step forward," he said.<