GRAYSON COUNTY, Texas (KTEN) — An investigation revealed that the online threat that led to a one-day shutdown of the S&S Consolidated Independent School District last Wednesday originated in another country.

"At this time, the Grayson County Sheriff's Office does not believe there is any credibility to the threat," Capt. Martin Hall said in a written statement on Monday. "It appears this email was sent from another country. There has been no evidence of anyone locally who have made any threats."

Out of an abundance of caution, the school district canceled all classes on April 12 after receiving the threat.