Authorities are offering a $10,000 reward for information about a fire that destroyed the four-story Lipton Tea building in Streator.

Police in the central Illinois city have called the Saturday night blaze "suspicious" but say it's too early to say it is arson. Streator has had 16 arson fires since May 2011. Mayor Jimmie Lansford appealed for residents' cooperation saying citizens must come together to solve the problem.

The fire is under investigation. The Illinois State Fire Marshal's office has visited the scene. Officials have asked residents to watch for suspicious activity.

The Lipton Tea building once was considered for the National Register of Historic Places. The company left Streator in 1964, and the warehouse most recently stored plumbing and heating equipment.