John Kerry, Sergei Lavrov shake hands at the conclusion of their press conference on September 9.
The United States and Russia have agreed to carry out joint air strikes in Syria if a newly agreed ceasefire holds for a week, Russian Foreign Minister Sergei Lavrov said on Friday.
"We will jointly agree on strikes against terrorists to be carried out by the Russian and American air forces. We have agreed on the zones in which these strikes will be carried out," said Lavrov.