Biden accuses Russia of 'irresponsible' nuclear threats, violating U.N. charter

U.S. President Joe Biden addresses the 76th Session of the U.N. General Assembly in New York City, U.S., September 21, 2021. REUTERS/Kevin Lamarque

UNITED NATIONS (Reuters) -U.S. President Joe Biden accused Russia on Wednesday of violating the core tenets of membership in the United Nations by invading Ukraine and said Moscow was making "irresponsible" threats to use nuclear weapons.

Speaking at the United Nations General Assembly in New York, Biden slammed Russian President Vladimir Putin for starting an unprovoked war that some 40 U.N. members are helping Ukraine fight with funding and weapons.