The Olin Brass plant on Illinois Route 3 in East Alton was placed on lockdown earlier today. Just before 2pm, East Alton Police says current employee phoned in a threat that led to the lockdown. The male employee was not on the Olin property at the time, and is currently being sought by police.

The nature of the threat has not been made public, and the all-clear was given just after 3:30. We'll have more on this story as details become available.

(Copyright WBGZ Radio / www.AltonDailyNews.com)