"The American administration should critically consider what is happening and the possible risks," the Russian Embassy told Newsweek.

Russia's Radiological Chemical and Biological Defence troops will be subject to an assets freeze and travel ban.

Britain has placed sanctions on Russia’s chemical warfare unit and its commander for dropping toxic First World War choking gas over battlefields in Ukraine.

A US delegation led by Secretary of State Antony Blinken will raise concerns with Asian leaders over growing South China Sea tensions and the civil war in Myanmar at a regional summit in Laos.Blinken’s attendance at the Association of Southeast Asian Nations summit this week is one of his last opportunities to convey Washington’s regional interest in person ahead of the November presidential election in the US.

Secretary of State Antony Blinken will represent the United States at summits with Asian leaders in Laos this week and expects to discuss human rights in Myanmar, China's "irresponsible" behavior in the South China Sea and Ukraine,

Secretary of State Antony Blinken will represent the United States at the Association of Southeast Nations (ASEAN) summits in Laos this week and expects to discuss human rights in Myanmar, China's "irresponsible" behavior in the South China Sea and Ukraine,