US Secretary of State John Kerry demanded Thursday that Russia stop bombing the Syrian opposition, implicitly blaming Moscow for the collapse in peace talks.<br />Speaking in London ahead of a conference on the Syrian humanitarian effort, Kerry said he had called Russian Foreign Minister Sergei Lavrov for a "robust" discussion.<br />In Geneva on Wednesday, UN envoy Staffan de Mistura suspended attempts to begin a dialogue between Bashar al-Assad's regime and the Syrian opposition.<br />Alongside Britain's Foreign Minister Phillip Hammond, Kerry read out sections of UN Security Council resolution 2254, passed in December, calling for an immediate ceasefire.<br />"Russia has a responsibility, as do all parties, to live up to it," he said.<br />"So I had a conversation this morning with Foreign Minister Lavrov.<br />We discussed, and we agreed, that we need to discuss how to implement the ceasefire."
