UPDATE: Crews were investigating a mysterious chemical smell that made some people sick. Deputy Chief James Mirza says, a couple of staff members who opened some letters experienced some symptoms of irritation in their eyes, throat and slight respiratory complications. In total, 8 people were checked out after opening envelopes.
Officials say that their initial sweep of the area didn't turn up anything unusual, but those envelopes were secured and sent out for testing.
There's no official word yet on exactly what that substance was that was found inside of those envelopes, but crews will continue to investigate.
Original report: A spokesperson with Brown University states that the Building has been cleared and everyone is allowed back in. The portion of Thayer street that was closed down should be back open by 7pm Thursday night.
Tower E of the Graduate center building on the Brown University campus was evacuated after an envelope with a substance was received Thursday afternoon.
The Graduate center holds several offices, someone associated with the University opened the envelope, that individual along with about half a dozen people reported the same symptoms.
Hazmat, FBI, Providence FD/PD along with Brown University PD are all on scene investigating the incident.
ABC 6 News will bring you the latest as information becomes available.