A pipe bomb exploded in an alley in the southern California city of Anaheim at about 13:50 Sunday, causing minor damage and forcing the evacuation of some nearby homes. br br Local residents reported the incident to the police after hearing a loud noise and seeing white smoke rising from the alley. br br No injuries have been reported as a result of the explosion, which occurred five kilometers away from the Disneyland theme park. br br A preliminary inspection by bomb squad personnel determined there had been a pipe bomb blast and that it had charred and damaged a concrete wall and a utility pole. br br Nearby homes were evacuated after the explosion, with residents allowed to return home shortly after. br br The incident is still under investigation.