1.   Serb gunners and snipers have often prevented convoys from getting through on that route, which passes through Bosnian government territory.

2.   But Bosnian radio said Wednesday they were still preventing convoys from passing.

3.   But continued heavy fighting is still preventing aid convoys from reaching the city.

4.   But rebel Muslim and Croatian Serb forces who have helped Bosnian Serb soldiers in that region again prevented aid convoys reaching needy civilians.

5.   Croatian Serbs control access to the pocket from Zagreb, and have prevented aid convoys for the last several weeks.

6.   For weeks, Serbs have prevented most convoys from reaching government-held regions.

7.   For weeks, Serbs have prevented most convoys from reaching most government-held regions.

8.   He has prevented several convoys from reaching hungry civilians in government-held areas and has demanded a large cut of the goods.

9.   He has prevented several convoys from reaching hungry civilians in the government-controlled part of the pocket in the past, demanding a large cut of the goods.

10.   On Tuesday, rebel Muslim and Croatian Serb forces who have helped Bosnian Serb soldiers in that region again prevented aid convoys reaching needy civilians.