US Makes UN Retract Iran's Invitation to Peace in Syria Talks

This looks like a move to signal that the United States will be cautious on Iran, despite the new deal. 

State dept. officials argued that since Iran has not endorsed the geneva convention the US cannot support their inclusion in these talks. 

This point makes plenty of sense to me. 

Sec­re­tary-Gen­er­al Ban Ki-moon, whose de­ci­sion to in­vite Iran had threat­ened to un­ravel the Syria talks less than 48 hours be­fore the sched­uled start, is­sued a state­ment on Mon­day re­scind­ing the in­vi­ta­tion. The Unit­ed States had said it was sur­prised by the in­vi­ta­tion be­cause Iran had not agreed to con­di­tions for the talks, to be held on Wednes­day in Mon­treux, Switz­er­land.