Unknown persons threw an improvised explosive device in the office of the Imam at the Islamic center of Bloomington, located in the U.S. state of Minnesota.
The incident occurred on Saturday, August 5, at about 5am local time. The explosion and resulting fire nobody has suffered, the building was damaged.
The attacker fled the scene, reports CBS Minnesota.
The investigation into the attack on the mosque is the FBI. For any information to help apprehend the criminal, a reward in the amount of 20 thousand dollars.