On Ukraine, U.N. chief says talk of nuclear conflict 'unacceptable'

World leaders address the 77th Session of the United Nations General Assembly at U.N. Headquarters in New York City

UNITED NATIONS (Reuters) - U.N. Secretary-General Antonio Guterres told a Security Council meeting on Ukraine on Thursday that talk of a nuclear conflict is "totally unacceptable" and any annexation of a state's territory by another state through the threat or use of force is a violation of the U.N. Charter and international law.

(Reporting by Michelle Nichols and Daphne Psaledakis, editing by Mary Milliken)