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Powder in balloon at State House turns out to be corn starch

A powdery substance found outside an entrance of the State House Thursday afternoon turned out to be corn starch, State Police said.

Around 2:45 p.m., firefighters received reports of a blue balloon with powder left outside the State House’s General Hooker entrance across from Beacon Street, said Steve MacDonald, spokesman for the Boston Fire Department.

Firefighters conducted a field test of the substance to see if it was hazardous. When the tests came up negative, they packaged the powder and transported it to a state lab in Jamaica Plain, where it will undergo further analysis, MacDonald said.

No one was injured and no evacuations were necessary, since the substance remained outside, MacDonald said.


State Police, who are investigating the incident, said late Thursday afternoon that the substance was corn starch.

Aneri Pattani can be reached at aneri.pattani@globe.com. Follow her on Twitter @apattani95.