Censor.NET reports citing Voice of America.
Kerry and Lavrov discussed ways to agree on military cooperation and information sharing in a bid to defeat Islamic State militants in Syria.
Kerry said that Syrians benefited from the calm following the February accord, but that the gains were lost again when violations of the agreement began.
He said: "The cessation, even flawed, was valuable." But violations "eventually became the norm, rather than the exception," he added.
Kerry said he and Lavrov agreed that there was no military solution to the Syrian situation. The Secretary of State said that the past few weeks of talks had been "fair, diligent, productive" and that the remaining "technical issues" would be worked out in the next few days, to "overcome the deep mistrust on all sides."
"The conflict will not end without a political solution," Kerry said.
Kerry said the sides may differ about the causes for the rupture, but both agree more work is needed to revive the deal and make it enforceable. Until then, he says he does not want to make any announcement concerning a resumption of peace talks.
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