Bomb units scrambled across Boston and Somerville today to investigate several suspicious devices.
"It's a hoax -- and it's not funny," Gov. Deval Patrick said.
This is an extremely serious situation," former FBI Director Bill Gavin told FOX News during the investigation.
"Whoever did this — whether it be kids or adults — if they think it's funny, I think they'll soon learn it's not that much of a humorous situation."