Hundreds of families have fled Pakistani tribal areas near the Afghan border where the air force has been targeting Taliban insurgents and their hideouts for over a week, officials said Tuesday.Jets and helicopter gunships killed nearly 25 insurgents in the latest strikes on Tuesday, AP quoted military and intelligence officials as saying.Most of the fleeing families are headed from North Waziristan to neighboring Bannu city, said Lutfur Rehman, an officer with the provincial disaster management authority. Some of the families are heading to live with their relatives, he said.