BBC, LONDON - The UN Security Council has voted unanimously to impose sanctions on Muammar Gaddafi's Libyan regime for its attempts to put down an uprising.
They backed an arms embargo and asset freeze while referring Colonel Gaddafi to the International Criminal Court for alleged crimes against humanity.
US President Barack Obama has said the Libyan leader should step down and leave the country immediately.
Gaddafi still controls Tripoli, but eastern Libya has fallen to the uprising.
Discussions on forming an anti-Gaddafi transitional government are reportedly under way.