FOUR HOLLISTER JUVENILES HAVE BEEN ARRESTED IN CONNECTION WITH A CASE OF SCHOOL VANDALISM. THE ARRESTS FOLLOWED AN INVESTIGATION PROMPTED BY RECENT GRAFFITI AT MARGUERITE MAZE MIDDLE, GABILAN HILLS ELEMENTARY, H-D-L-A, AND SAN ANDREAS SCHOOLS. OFFICIALS SAY THE SUSPECTS MAY HAVE ALSO BEEN INVOLVED IN A RECENT CASE OF ARSON OUTSIDE HOLLISTER.