US prepares more Russia sanctions

The United States said Tuesday it was preparing more sanctions against Moscow over the attempted assassination in Britain of a former spy, after a previous round sowed chaos on Russian markets.

Three months after the United States declared that Russia violated a US law that seeks the elimination of chemical and biological weapons, the State Department told Congress in a legally-mandated follow-up that Moscow had not come into compliance.

"We intend to proceed in accordance with the terms of the (Chemical and Biological Weapons) Act, which directs the implementation of additional sanctions," State Department spokeswoman Heather Nauert said in a statement.

She said the State Department was in discussions with Congress, which has led the push to punish Russia, to determine the exact measures.

British investigators said Russian operatives on March 4 tried to kill Sergei Skripal, a former intelligence officer and double agent, and his daughter Yulia Skripal in the English city of Salisbury.

The attack involved Novichok, a military-grade nerve agent developed by the Soviet Union during the Cold War. The two Russians survived but a third person died after exposure.