TOMAH, Wis. – An email threat against Tomah High School staff and students sent police into high alert. Police with K-9 aides, backed up by State Patrol troopers, spent Saturday scouring the building. They found nothing suspicious. Mike Hanson, school district administrator, said later that classes would resume as usual Monday but with an extra police presence at all 12 Tomah district schools. The targeted high school has 870 students. Investigators from the state Division of Criminal Investigation and the FBI said the email appears to have originated outside the United States. It was sent to 78 Tomah High School employee email addresses.