MOSCOW - Russian Foreign Minister Sergei Lavrov urged UN-Arab League envoy Kofi Annan on Tuesday to step up efforts to ensure Syrian opposition groups adhere to his ceasefire plan, the Foreign Ministry said in a statement.In a telephone conversation with Annan, Lavrov "put special emphasis on the fact that the Syrian opposition and countries supporting it must also take urgent measures aimed at providing for a stable ceasefire, calling on Annan to increase work with them in that direction," it said.
