Libyan dictator Muammar Gaddafi has vowed "death or victory" after rebels seized his headquarters in Tripoli, according to an audio message broadcast by a pro-Gaddafi TV station.

He said the retreat from his headquarters was a "tactical move" and his current location is unknown.

Watch video of Melissa Harris-Perry reported on some of the latest developments in Libya, courtesy of MSNBC, below:

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