An investigation is underway after an explosive device was detonated outside the office of the Alabama attorney general this weekend, officials said. No one was hurt in the Saturday morning incident in Montgomery, Alabama Attorney General Steve Marshall said in a statement on Monday. “The Alabama Law Enforcement Agency will be leading the investigation, and we are urging anyone with information to contact them immediately,” Marshall said. The Alabama Law Enforcement Agency’s State Bureau of Investigation was notified of the suspicious package at 8:19 a.m. local time Monday. It was determined that the suspicious package was an explosive device that…