Iran is seeking to build consensus during nuclear talks in Vienna around its proposed "endgame plan," warning other parties that only a limited time remains to narrow the gaps, a senior Iranian official said Thursday.

The new initiative proposed by Iran to break the deadlock in multilateral talks amounts to a comprehensive plan of action, aiming to advance simultaneously the lifting of U.S. sanctions on Iran as well as Tehran's full compliance with the 2015 Joint Comprehensive Plan of Action (JCPOA) nuclear deal through a sequence of steps.

"Based on the endgame plan, which initially had been proposed by Iran in a senior official meeting in Frankfurt on March 29 and then was accepted by all parties in a virtual meeting of the JCPOA Joint Commission on April 2, the United States needs to lift all sanctions imposed, re-imposed or re-labeled during the Trump Administration in one step," the official told Kyodo News on condition of anonymity.