The leaders of the United Kingdom, the United States, Germany and France issued joint statements against Russia and the assassination attempt on former spy Skripal.
"It is an attack on the sovereignty of the United Kingdom and any such use by a state is a clear violation of the Chemical Weapons Convention and a violation of international law. Threatens the safety of all of us "
The use of a Russian-style military-grade nerve agent in Salisbury is said to be the first aggressive use of such a substance since World War II.
The leaders sided with Britain and shared the view that "there is no possible alternative explanation" to Russia's "extremely likely" responsibility for the attack.
In a joint statement, they called on Russia to provide answers to all questions raised in the case and to provide a full and complete disclosure of the Novitsok program to the Organization for the Prohibition of Chemical Weapons.
The British Prime Minister, during her visit to Salisbury, stated that she wants to allay the concerns of the city's residents and that her government holds Russia responsible for the "arrogant and vile" action.
Earlier, UK Secretary of Defense Gavin Williamson said there was no doubt that the attack on Sergei Skripal was carried out by Russia. Asked if we were entering a new era of the Cold War, he joked that the "cool war" with Russia certainly seemed "extremely bitter".
Responding to this comment, the representative of the Russian Ministry of Foreign Affairs said that it is obvious that Britain is concerned and that it hides the conditions of the use of chemical substances in its territory, without disclosing the information that it is obliged to disclose based on international chemical conventions.