The Associated Press and JTA report: The U.S. said Wednesday that Iran can undertake some construction work at a key nuclear facility as long as fuel isn’t produced and advances aren’t made on a planned heavy water reactor.

The Arak site was among the thorniest issues negotiators sought to resolve in last weekend’s nuclear agreement in Geneva.

The White House said afterward Iran wouldn’t advance its “activities” at Arak or progress toward plutonium production. It spelled out several more constraints.

Iranian Foreign Minister Mohammad Javad Zarif said Wednesday while his country was honoring the deal, construction on building projects would continue.

Iran opens contacts with major Western oil companies (Financial Times)