The Israeli army has arrested 13 United Nations employees on suspicion of terrorist activities.
Army officials said Tuesday charges will be brought against the 13. But they did not provide specifics.
The arrests come after Israel complained to the United Nations, saying Palestinian militants were using U.N. ambulances to transport weapons.
But Israeli officials now concede that military experts might have mistaken a stretcher for a rocket in a video showing an object being loaded into a U.N. vehicle. Officials say there is a difference of opinion among analysts as to whether the object was a rocket or a stretcher.
U.N. Secretary-General Kofi Annan launched an investigation into those accusations late Monday. The world body insists it does not hire terrorists and does not tolerate any militant activity by its staff.