WASHINGTON – President Barack Obama said Thursday U.S. military aircraft will help move refugees from the Libyan border, as he called on leader Muammar Gaddafi to leave and demanded an end to violence against the Libyan people.

The United States and countries around the world are outraged by Gaddafi's crackdown in Libya, Obama said.

Obama has called on Gaddafi to leave the oil-producing North African country in written statements issued by the White House, but this was the first time he had said so in public. He also issued a warning to any of Gaddafi's officials found to have been promoting attacks on Libyan citizens.

“Those around him have to understand that violence that they perpetrate against innocent civilians will be monitored and they will be held accountable for it,” Obama said.

Obama said U.S. military and civilian aircraft would help move Egyptians now stranded at the Libyan border with Tunisia.

An organized international airlift relieved the pressure of a surge of people from Libya into Tunisia on Thursday.