Libya's provisional authority says it has created a supreme security committee that will protect Tripoli.

National Transitional Council member Ali Tarhouni announced the decision on Saturday. He said the committee would work to protect the capital's public and private sectors and eliminate remnants of forces loyal to Moammar Gadhafi.

The announcement of the committee has come on the heels an NTC decision to move its headquarters from Benghazi to Tripoli. The provisional authority says relocation will take place within the next week.

In a separate development, U.N. envoy Ian Martin arrived in Tripoli on Saturday for talks with the NTC on Libya's future. His meeting comes after the provisional authority received a financial boost on Thursday when world leaders pledged $15 billion in monetary and humanitarian support.

Tarhouni also said Saturday that oil production would resume at two refineries in mid-September. On Friday, provisional leaders announced that five international energy firms were resuming operations in the country — a critical step in efforts to rebuild an economy wracked by civil unrest and sanctions.

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