UN Security Council wants more details of deal creating Syria safe zones

Russia wants the United Nations Security Council to endorse an agreement reached in the Kazakh capital of Astana last week to establish ''de-escalation zones'' in Syria, but several council members say they need more information before they can back the deal aimed at bolstering a ceasefire.

The memorandum signed by Russia, Turkey and Iran came into effect on the weekend and calls for a truce renewable after six months between government and opposition forces in four designated safe zones as well as the delivery of aid and medical supplies. One of the sites includesIdlib province in northern Syria, where dozenswere killed following a chemical weapons attack in April.

• Syria violence kills 4 despite safe zones
• Assad denies responsibility for chemical attack

Russia distributed a draft resolution on Friday asking for Security Council endorsement, but some members feel it's premature.

''The question today is do we have all elements we need to understand the substance of the agreement and the way it is going to be implemented,'' said France's ambassador to the UN, Franois Delattre. ''The answer to this question is 'not yet'.''

'We hope for more information'

''We want peace and stability and humanitarian access in Syria,'' said Sweden's ambassador to the UN, Olof Skoog. ''We hope for more information before we have to go to a vote on the resolution.''

Council members are expected to meet behind closed doors this week to discuss the terms of the deal. The three guarantors have until June 4 to establish the borders of the safe zoneswhile details on who will oversee the ceasefires and the aid deliveries is not yet clear.

''There will need to be effective monitoring mechanisms as well as full and sustained humanitarian access,'' said aUN diplomat.

Implementing the deal would be ''complicated,'' the diplomat said.

The U.S. expressed skepticism about Iran's role as a ''so-called guarantor'' of the deal,and on Tuesday, in a move that will likely irk ally Turkey, the Pentagon announced the U.S. will provide arms to Kurdish fighters in Syria, a decisionthe U.S.sees "as necessary to ensure a clear victory"in its planned assault on the ISIS stronghold of Raqqa.

• U.S. to arm Kurdish fighters in Syria

Lavrovto make case in D.C.

On Wednesday, RussianForeign Minister SergeyLavrov will make the case for the Astana memorandum when he meets with his U.S.counterpart, Secretary of State Rex Tillerson, in Washington.

Syria has said it will abide by the deal as long as the rebel forces do so as wellbut made it clear it does not want the UN involved.

"There will be no international forces under the command of the United Nations in the de-escalation zones,'' Syrian Foreign Minister Walid al-Moallem told a newsconference in Damascus on Monday. ''There will be no role of the UN or international powers in these areas."

The next round of UN-brokered Syria peace talks is set to take place in Genevaon May 16.