The UN Security Council will meet anew Monday behind closed doors to discuss the crisis in Ukraine

The UN Security Council will meet anew Monday behind closed doors to discuss the crisis in Ukraine, diplomats said.
  
The informal meeting, which is scheduled for 3 pm local time (1900 GMT), was requested by Ukraine, whose UN representative will attend. It will be the fifth Security Council meeting on the issue in ten days. "It is going be quite a tense week leading to the referendum on Sunday," a diplomat said, referring to Security Council activity.
  
The pro-Russian parliament on the Crimean peninsula has convened a referendum to decide whether to break away from Ukraine and join Russia. The vote is regarded as illegal by both Kiev and the West.
  
The Security Council has so far failed to adopt a common position on the Ukrainian crisis. Moscow, a permanent member of the panel, can use its veto to block any decision by the body.