U.S. State Department spokesperson Victoria Nuland said on Thursday that Washington expected the UN to lead the potential police support to Libya if it was requested by the country's opposition.

"We will look favorably at police support requests that come from the TNC to the UN," Nuland said at a regular briefing. "The UN will have the lead, but we will look at how the U.S. can help."

When asked if the U.S. is willing to put any U.S. citizen police on the ground in Libya, she refused to give a comment.

But Nuland made it clear that the Libyan opposition, National Transition Council (NTC), did not expect they would need a peacekeeping force, and "there's no anticipation of foreign military requirement."

Among the 1.5-billion-dollar Libyan frozen assets that the U.S. was working to release to NTC, Nuland said 500 million dollars is for humanitarian need, 500 million dollars is for civilian fuel needs, and the rest 500 million dollars is for the temporary financial mechanism established by the Libya contact group a few months ago.