AMSTERDAM (Dec. 25)
West German authorities have warned officials at Schiphol Airport that two Black September groups entered Western Europe through Brussels last week. The Arab terrorists are reportedly armed with SAM-7 rockets. Furthermore, the government has ordered increased vigilance during the holidays at all vital points of the country’s natural gas network to guard against possible sabotage. Exceptional security measures will also be maintained at oil refineries and chemical industries sites in the Rotterdam area.