The State Department notified Congress that Russia ignored a deadline to swear off the use of chemical weapons, opening the possibility of new sanctions linked to a nerve-agent attack in the U.K.

The department determined that Russia hasn’t met the conditions set forth in the 1991 Chemical and Biological Weapons Control and Warfare Elimination Act, spokeswoman Heather Nauert said in a statement Tuesday. The law requires Moscow to assure the U.S. that it will no longer use chemical or biological weapons, and allow inspections to verify the claim.

“The Department is consulting with Congress regarding next steps,” Nauert said, referencing a legal requirement that can be dragged out before any sanctions are either imposed or waived.

Read more here.