UNITED NATIONS (AP) — The U.N. Security Council will vote Monday on an Australia-proposed resolution demanding international access to the Ukraine plane crash site and a cease-fire around the area, with diplomats pressuring a reluctant Russia to approve it.

Diplomats held consultations late Sunday until past midnight to work out differences between Australia and Russia, which has the power to veto the resolution as a permanent council member. The diplomats emerged cautiously optimistic that a resolution would be approved, but Russian Ambassador Vitaly Churkin would not guarantee it.