Marshall County High School in Benton was on lockdown and a suspect was in custody as paramedics tended to the injured and wounded, police said.
Some experts think the FDA, the federal gatekeeper for prescription medication, could have prevented the worst health crisis in the nation's history.
A U.S. official, who was not authorized to comment by name and demanded anonymity, did not give exact figures for either the U.S. fatalities or injuries.
Brandon Griesemer was accused by the FBI of calling CNN 22 times on Jan. 9 and 10, railing against African-Americans and Jews and threatening a mass shooting.
A tsunami watch issued for coastal areas from Washington state to California was canceled nearly three hours after a magnitude 7.9 earthquake struck the Gulf of Alaska.