US Secretary of State John Kerry is currently in Geneva in a bid to begin a new ceasefire in Syria.
Kerry would hold talks with the UN envoy to Syria, Staffan de Mistura along with the Saudi and Jordanian Foreign Ministers.
A Russian defence official said that negotiations are currently taking place to establish a ceasefire.
A previous ceasefire has ended after Syrian government air raids had collapsed an MSF hospital, killing two doctors and dozens of patients.
According to Russia and Syria’s governments, the al-Nusra front was its target with the air raids.
“We are talking directly to the Russians, even now,” Mr Kerry said on arrival in the Swiss city, as he began talks with Jordanian Foreign Minister Nasser Judeh.
The US wishes for Russia to place pressure over the Syrian government to cease their assault. “These are critical hours. We look for Russia’s co-operation. We obviously look for the regime to listen to Russia and to respond to the international communities’ powerful statement to the UN Security Council.”
The US secretary of state stressed that a UN Security Council Resolution called for a “full country, countrywide, cessation and also for all of the country to be accessible to humanitarian assistance”.
“Obviously that hasn’t happened and isn’t happening,” he said.