White House: Sanctions on Iran to Remain Until Progress on Nuclear Deal Verified

'We want to make sure they don't cut any corners,' White House spokesman says.

AP

REUTERS - Iran has made important progress in its effort to implement the international agreement to curtail its nuclear program, but its actions must still be independently verified, the White House said on Friday. 

"We want to make sure they don't cut any corners," White House spokesman Josh Earnest told a briefing. 

He said Iran would not receive sanctions relief until the International Atomic Energy Agency (IAEA) confirms it has complied with the agreement. Earnest said he had no update on the timing of the implementation of the nuclear deal. 

On Thursday, the U.S. State Department said that concrete has been poured into the core of Iran's Arak nuclear reactor, a move critical to the implementation of the nuclear agreement Tehran reached with major powers.