Washington( CNN) Democratic Sen. Richard Blumenthal on Friday blamed Russia for Syria’s links to chemical weapons, condemning Moscow for violating an arrangement to dispose of Syria’s stock of deadly gas.

On CNN’s “Erin Burnett OutFront” Friday night, Blumenthal mentioned Russia “clearly” failed to uphold its end of a bargain made between Russian President Vladimir Putin and former US President Barack Obama in 2013 to oversee the elimination of Syria’s chemical weapons stockpile.

“Obama reached an agreement with Russia, Russia failed to hold up their end of the agreement, ” he said.