In turn, U.S. State Department officials insisted the new sanctions were triggered automatically by longstanding U.S. policy regarding the use of chemical weapons by state actors.
The US announcement fuelled already worsening investor sentiment about the possible effect of more US sanctions on Russian assets and the rouble slid by over 1 per cent on Thursday against the dollar, a day after falling towards its lowest level in almost two years. "By economic means, by political means and if necessary by other means", he added. And our American friends need to understand this, ' he said, speaking on a trip to the Russian Far East.
Russia is already under US sanctions for its 2014 invasion of Crimea, and the Trump administration expelled 60 Russians from the USA and shuttered the Russian consulate in Seattle in response to the failed assassination attempt.
On Wednesday, the US State Department announced a new round of sanctions targeting Russian exports of dual-purpose electronics and other national security-controlled equipment, which will come into effect on August 22.
More worrying for Russian Federation, however, is that the law cited by the administration includes a second provision that will impose a second round of far more punishing sanctions on Moscow if it now fails to comply with the legislation within 90 days.
The attack prompted an initial wave of diplomatic expulsions between U.S. -Britain allies and Russia - including the tit-for-tat exit of 60 Russian and U.S. diplomats in March. Russia's motivation can only be guessed at but the most plausible explanation is that, with or without President Putin's explicit approval, Russian military intelligence sought to punish a traitor and test the limits of western patience with a single batch of the nerve agent known as novichok.
"We once again flatly reject any accusations regarding the possible involvement of the Russian state in what happened in Salisbury".
Lucas Perez posts on twitter after West Ham move confirmed
Perez was signed from Deportivo La Coruna for £17m in the summer of 2016 but failed to establish himself as a regular in the team. Perez scored seven times in 21 appearances for Arsenal , including a hat-trick in the Champions League away to Basel .
"The administration is rightly acting to uphold worldwide bans on the use of chemical weapons", said Ed Royce, R-Calif., chairman of the House Foreign Affairs Committee.
Medvedev's tough talk on August 10 came after the United States announced a new round of sanctions and US lawmakers proposed further measures, including restrictions on the operations of several state-owned Russian banks and curbs on their use of the USA dollar.
Chairman Ed Royce (R-Calif.) wrote to President Trump on July 26 that enforcement of the Chemical and Biological Weapons and Warfare Elimination Act of 1991 in Russia's UK Novichok attack "is critical to deterring additional attacks".
The State Department said Wednesday the new sanctions were in response to "the use of a "Novichok" nerve agent in an attempt to assassinate United Kingdom citizen Sergei Skripal" - who was a Russian double agent - and his daughter Yulia on English soil in March.
The attack prompted the United Kingdom and its Western allies to expel many Russian diplomats - and Russia retaliated with its own expulsions.
Sanctions waivers were in place for certain key sectors, including space flight activities and commercial aviation safety, the official said.