Port Huron Police were dispatched to Port Huron High this morning after various postings on the social website Facebook were found to have threats about the building in the 22-hundred block of Court Street.  There have been no credible threats found according to police on the scene.  Although on alert the school day is progressing normally with no evacuations noted.  Police say they will remain on the scene until they are confident there is no problems.  The threat came on the heels of various reports of similar problems in some districts in Lapeer, Genesee, and Sanilac Counties.