Russia says it will expel 60 American diplomats and close the U.S. consulate in St. Petersburg.
Russia's foreign minister announced the decision Thursday, just a few days after President Donald Trump ordered dozens of Russian diplomats to be expelled from the U.S.
Earlier this month, a nerve gas attack in southern England put a former double agent and his daughter in critical condition.
British Prime Minister Theresa May and other world leaders have blamed Russia for the attack. Russia has denied any involvement.