BELOIT - Beloit Police and Fire crews were on scene investigating reports of at least 11 people experiencing what an official calls burning eyes after touching an envelope.

A City of Beloit spokeswoman told Newsradio 620 WTMJ's Jon Meerdink that the police and fire chief were both headed to Beloit Community Health after the initial report, which came in at about 10:30 a.m.

"They were responding for the report of some employees that were having side effects after handling an envelope," said spokeswoman Beth Jacobsen.

Sixty-five people were all quarantined, but as of 4 p.m. Thursday, 15 of those people have been "decontaminated."

"Of the fifteen, seven people were transported to Beloit Memorial Hospital and eight were transported Mercy Hospital for additional evaluation," Jacobson said. "This number includes two emergency responders, a three year old child, and two women who are pregnant. Some of the fifteen were transported as a precautionary measure and may not have had direct contact with the substance."

WISC Madison-7 hours ago In a news conference at 4:25 Wednesday afternoon, Beloit police Capt. Vince Sciame said investigators are headed to the home of that ...

Three people who handled envelope in Beloit suffered burning eyes

Lt. Joe Trovato of Wisconsin National Guard said its 54th Civil Support Team is on scene and expected to test the substance in a mobile lab Wednesday.