Apparently Qaddafi had laid mines outside of Ajdabiya. They were all safely removed, but this indicates that there are more mine threats elsewhere. From the Times:
both antivehicle and antipersonnel mines had been found in the ground. An electrical utility truck ran over and detonated two antipersonnel mines on Monday, and 24 antivehicle mines and more than 30 antipersonnel mines were later removed from the same area. No injuries were reported.
This enhances the case for ICC prosecution.