UNITED NATIONS - UN diplomats say the Security Council will vote Tuesday on a draft UN resolution that would impose an arms embargo on leaders of Yemen's Shiite Houthi rebels and their key supporters, ex-president Ali Abdullah Saleh and his son.

The resolution is aimed at ending the Houthis military campaign against supporters of the embattled current president, Abed Rabbo Mansour Hadi, and the rebels' attempt to take over the strategic Mideast country.

Russia has insisted on an arms embargo on all parties to the conflict - not just the Houthis and their supporters.

Diplomats said Monday it isn't clear whether Moscow will abstain or veto the resolution.

They spoke on condition of anonymity because negotiations have been private and the meeting hasn't been officially announced.