Update, July 16, 6:45 p.m.: Testing performed today by the State Hygienic Laboratory in Coralville on the envelope and contents received by mail and opened by a counselor in a University of Iowa residence hall today has revealed no harmful substances.

The laboratory conducted a standard battery of tests used to identify toxic substances that would pose a chemical threat. The sample has been sent to the laboratory's Ankeny facility for further verification that it poses no public health threat.

Update, July 16, 4:30 p.m.: The counselor treated after opening the suspicious envelope has been released from UI Hospitals and Clinics.

On Monday morning, July 16, an envelope was received via U.S. Mail at Stanley Hall on the University of Iowa campus. A counselor with the university's Upward Bound program opened the package, which contained a powdery substance.

After starting to feel ill later in the morning, the counselor called University of Iowa Police, who responded along with the Iowa City fire department. As a precaution, officials sealed off a shower, the student's room, and mail areas.

The counselor was transported to UI Hospitals and Clinics for treatment, and the suspicious material is now at the State Hygienic Laboratory for analysis.

Approximately 47 students and staff associated with the Upward Bound program at the time are in the process of being directly notified of this incident. Parents of Upward Bound students with questions should call 319-335-3555.

No further information is available at this time. Updates will be provided as soon as they become available.