This is hearsay, strictly speaking, but it’s hearsay from a Bishop to the Italian foreign minister, at least:

Libyan leader Muammar al-Qaddafi has very likely left the capital Tripoli and has most likely been wounded, Italian Foreign Minister Franco Frattini said on Friday.
Frattini told reporters in Tuscany that he believed what he had been told by Giovanni Innocenzo Martinelli, the Catholic bishop in Tripoli, that “Gaddafi was outside Tripoli and probably even wounded” by NATO airstrikes.