Palestinian gunmen abducted a Dutch school principal and his Australian deputy Wednesday, as they drove to work at a private American school north of Gaza City. The kidnappers forced the men out of their car and drove off with them in another vehicle. The abduction took place on the last day of school before the Christmas break and a day after a group of gunmen threatened to abduct foreigners if their demands to be folded into the Palestinian security services were not met. Disorder and chaos are widespread in Gaza, where foreigners have been kidnapped on several occasions by gunmen, who use the captives to press demands from Palestinian authorities.