Bombs have been hurled at the fisheries department office in Magura in the wee hours of Monday during blockade and shutdown by the 20-Party alliance.Additional Superintendent of Police Sudarshan Roy said that the incident happened after midnight and a car parked in the office’s garage was also set on fire.Witnesses said, they heard several explosions of handmade bombs near the office of the fisheries department.Fisheries Department’s Office Assistant Nazrul Islam told bdnews24.com that they rushed to the office after the explosions and found the car in flames.Local fire Service department put out the flames.