A big blast was heard inside a base of the Popular Front for the Liberation of Palestine-General Command- (PFLP-GC) in the western Bekaa near the Syrian borders, a security source said. The source, asking anonymity, told KUNA the blast occured in a depot of ammunition of the PFLP-GC. No casualties were reported. He said elements from the Front cordoned off the area. No further details were available. The PFLP-GC is the sole Palestinian group with bases outside the 12 Palestinian refugee camps in Lebanon.