India, June 22 -- Former Trump US Defense Secretary Mark Esper has voiced sharp concerns over the newly signed Memorandum of Understanding (MOU) between the United States and Iran, saying he has "serious questions about several parts of the agreement in the NBC News' Meet the Press show.

Speaking to Meet the Press, Esper said, "I like the fact that we've extended the ceasefire. I like the fact that the Strait is being opened up... And I like the fact that we're getting into a nuclear talks." He added, "When I look at the MOU, there are many of the points that I have serious questions about and concerns about.I think in many ways, it's a wait and see."

Explaining his biggest worry, Esper said, "My principal concern has been that it appea...