By Hayley Fowler From The Charlotte Observer CHARLOTTE, N.C.—State and local law enforcement officials in North Carolina are investigating after threatening calls about suspicious packages were made at 16 different high schools over a period of two days. The latest call resulted in students being evacuated from a high school and middle school in Western North Carolina on Thursday, April 7, the Henderson County Sheriff’s Office said. Sheriff Lowell S. Griffin said deputies found a package similar to what was described in the call but no explosives. He said he’s since been in contact with officials from the State Bureau of Investigation and N.C. Emergency Management. “We’ve learned that this event seems to be associated with a disturbing pattern of similar calls across the state,” Lowell said during a news conference. “It’s my understanding that very similar situations have occurred at 16 different North Carolina high schools encompassing 13 different …