11.   As the Serb rebels took hundreds of peacekeepers hostage and blocked supply convoys, NATO started urgent plans to evacuate the U.N. force.

12.   Bosnian Serb authorities also have blocked convoys to Sarajevo.

13.   Bosnian Serbs also have been blocking U.N. convoys carrying food and medical supplies.

14.   Bosnian Serb authorities also have been blocking aid convoys from reaching Sarajevo.

15.   Bosnian Serbs currently are blocking land convoys into Sarajevo.

16.   But now almost half of all U.N. peacekeepers serve in former Yugoslavia, where supply convoys have been blocked and U.N. soldiers have been harassed by combatants.

17.   But Serbs continued to block a convoy of medical supplies bound for Srebrenica, another government-held city in the east.

18.   Convoys were frequently blocked by the Serbs.

19.   Croatian Serbs have also blocked convoys.

20.   Fighting surges in northwest Bosnia on Friday and Serbs block aid convoys to Sarajevo.