Fire scene tape remained stretched across the entrance to the Ihsan Islamic School at 423 West Onondaga Street in Syracuse, New York as I walked the perimeter of the property yesterday morning.. The criss-cross of the yellow barrier serves a lone public reminder of a mysterious explosion that occurred there last Thursday afternoon. According to authorities, the blast occurred in an "unused" portion of the basement, spewing a cloud of natural gas, debris and dust into the main area of the building and forcing the evacuation of about 75 students and school personnel.