The Department of Energy and Environmental Protection is investigating a suspicious letter addressed to a state representative that a legislative intern discovered on Friday.
House Speaker Brendan Sharkey said the intern on Friday opened a waxy envelope that had an unidentified powder.
The intern was being kept in the room, accompanied by a state Capitol police officer, until hazardous materials staff from DEEP arrived, Sharkey said, and "she seems fine."
State Capitol police said they determined that there was no threat.
Last month, authorities investigated two suspicious pieces of mail sent to Gov. Dannel P. Malloy.
One of those letters was sent by someone who called the governor's constituent services office, claiming they had sent anthrax. A field test showed the letter tested negative for the infectious disease, which is caused by a type of bacteria.