The developments came as hundreds of other migrants arrived in Italian ports after having been rescued in recent days from overcrowded dinghies and fishing boats. Most have been setting off from Libya, where human traffickers charging migrants around USD 1,000 apiece for the crossing are operating with near-impunity amid the country's political chaos.
The EU's foreign policy chief, Federica Mogherini, is to brief the Security Council on Monday about the crisis and the need to coordinate the fight against traffickers, her office said.
Some European Union leaders had proposed a UN-blessed operation to destroy smugglers' boats before they are used.
The idea, however, has raised a host of legal concerns and Russia which has veto power at the Security Council has already opposed any ship-destruction resolution.
However, Russia is said to support the draft resolution calling for the ships to be seized, said the council diplomat, who spoke on condition of anonymity because he wasn't authorized to provide details of the negotiations.
