Libya:
In a new audio message from hiding, Muammar Gaddafi calls on his followers to rise up and fight, saying "this is the zero hour."
Fighters from the revolutionary forces that drove him from power last month have begun an assault on one of his last areas of support in the town of Bani Walid, southeast of the capital.
Gaddafi's latest message was broadcast repeatedly on the town's radio station last night.
In it, he urges supporters to fight and says those who don't will go to hell.