What's even more incredible is that the animals were actually carrying espionage equipment, at least according to the Iranians.
"In recent weeks, intelligence operatives have arrested 14 squirrels within Iran's borders," state-sponsored news agency IRNA reported. "The squirrels were carrying spy gear of foreign agencies, and were stopped before they could act, thanks to the alertness of our intelligence services."Apparently, information about what sort of spy gear the rodents were carrying is thin on the ground.
Iran claims the rodents were being used by Western powers in an attempt to undermine the Islamic Republic.
Edit: Boing Boing have also reported on this, with the awesome headline, "Cry havoc, and let slip the squirrels of war".