11.   U.N. military operations and vital humanitarian aid distribution threaten to grind to a halt because of a Serb blockade on fuel, U.N. officials said Saturday.

12.   For the last two years it has been wholly dependent on humanitarian aid but these supplies have been intermittent due to a Serb blockade on aid deliveries.

13.   Even UN forces deployed in the pockets, which have been designated UN safe areas, are short of medical supplies because of a Serb blockade.

14.   The Serb blockade is meant to bleed the Moslem-led army in Srebrenica, Gorazde and Zepa should fighting break out when the truce ends end of April.

15.   They would also protest the continuing Serb blockade of fuel convoys meant for besieged Moslem-held enclaves, Spicer said.

16.   The convoy is the second attempt by the United Nations to sneak humanitarian aid past the Serb blockade of the city.