"We welcome the continued support of the United States today, which imposed sanctions on chemical and biological weapons in response to Russia's use of the deadly nerve agent in Salisbury," he wrote on Twitter.
Earlier, the United States announced the introduction of a second package of sanctions against Russia in the case of Skripale.
The document provides for restrictions for US banks to participate in the primary market of Russian sovereign debt, not denominated in rubles, as well as lending to the Russian government in rubles and licensing restrictions.