11.  An unidentified plane exploded while flying over the Alps early Thursday, and authorities launched a search for the wreckage, French media reported.

12.  In some cases, fighters pull alongside an unidentified plane to call in its tail number to authorities.

13.  The sources, who spoke on condition of anonymity, said the unidentified plane landed without being hit and unloaded dozens of Portuguese-speaking passengers.

14.  U.N. spokesman Maj. Herve Gourmelon said U.N. military observers using night vision equipment had spotted three unidentified planes close to the airfield Sunday night.

15.  U.N. spokesman Maj. Herve Gourmelon said U.N. observers spotted three unidentified planes close to the airfield Sunday night.

16.  U.N. spokesman Maj. Herve Gourmelon said U.N. military observers using night-vision equipment spotted three unidentified planes close to the airfield Sunday night.

17.  He said the suspension was ordered after the appearance of unidentified planes over southern Sudan and because of the need to protect UN aircraft.

18.  Around the same time, jets were readied when an unidentified plane briefly violated the temporary flight restrictions around Washington.

19.  Unidentified planes flew over the Bosnian Serb stronghold of Pale near Sarajevo Tuesday evening, residents reached from Belgrade said.

20.  Unidentified planes flew over the Bosnian Serb stronghold of Pale near Sarajevo on Tuesday evening, residents reached from Belgrade said.