A former student held a Stissing Mountain High School administrator hostage for more than an hour Tuesday morning, then surrendered to police without firing a shot, police officials said. No one was injured in the hostge taking.

Trooper Tom Jones Jr. said police are going room by room through the combined middle and senior high schools as a precaution, evacuating students as they go.

A state government official said the man in custody is Christopher Craft of Pine Plains and the hostage was Stissing Mountain Middle School Principal Bob Hess. The official spoke on condition of anonymity because he was not authorized to release details.

The Stissing Mountain middle and high schools share a campus.