An analyst for London-based consultancy Control Risks said the use of military aircraft on his own people indicated the end was approaching for Muammar Gaddafi.
"These really seem to be last, desperate acts. If you're bombing your own capital, it's really hard to see how you can survive," said Julien Barnes-Dacey, Control Risks' Middle East analyst.
"But I think Gaddafi is going to put up a fight. I think the rumours of him fleeing to Venezuela are going to prove wide of the mark. In Libya more than any other country in the region, there is the prospect of serious violence and outright conflict."