DUBAI, United Arab Emirates — Iran's theocracy prepared Sunday for a possible confrontation with the West after the United Nations reimposed sanctions over its nuclear program, even as some pushed for continued negotiations to ease the economic pain squeezing the country.

The sanctions imposed before dawn Sunday again freeze Iranian assets abroad, halt arms deals with Tehran and penalize any development of Iran’s ballistic missile program, among other measures. It came via a mechanism known as “snapback,” included in Iran’s 2015 nuclear deal with world powers.

Iran's Parliament briefly denounced the sanctions before going into a closed-door session likely to discuss the country's response, which could include abandoning the Nuclear Nonproliferation Treaty and rushing for the bomb. People

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