The Council on American-Islamic Relations (CAIR) says an acid bomb was thrown at the College Preparatory School of America in Lombard.
This attack occurred late Sunday night as people attended a Ramadan prayer service. Worshippers found a two-liter bottle, which had apparently been filled with chemicals, near a window.
No one was hurt.
Meanwhile, bond was set at $45,000 for David Conrad, 51.
He is accused of firing shots from an air rifle at the Muslim Education Center in Morton Grove.