UNITED NATIONS/BEIRUT—Russia and the United States tangled on Tuesday at the United Nations over the use of chemical weapons in Syria as Washington and its allies considered whether to strike at President Bashar al-Assad’s forces over a suspected poison gas attack last weekend.
Moscow and Washington could not come to an agreement at the U.N. Security Council in order to set up international investigations into chemical weapons attacks in Syria, which is in the throes of a seven-year-old civil war.
