US | Maryland Smoking Packages in Maryland Work of 'Lone Wolf' Terrorist groups weren't involved: congressman By Matt Cantor Posted Jan 7, 2011 10:40 AM CST Copied Police and fire vehicles sit outside of the Maryland Department of Transportation building after a package exploded earlier in the day, Thursday, Jan. 6, 2011, in Hanover, Md. (AP Photo/Rob Carr) The sender of two packages that released smoke when they were opened in Maryland yesterday was a “lone wolf,” not affiliated with any group, said a congressman briefed on the matter. Maryland’s governor, to whom one package was addressed, said it contained a note deriding highway signs that call on drivers to "report suspicious activity." "Somebody doesn't like seeing that sign," he said. “I believe this is what we call in intelligence a lone wolf situation, involving an individual who for whatever reason was upset with state government,” said Maryland Rep. Dutch Ruppersberger. Postal employees returned to work today, but officials remain on alert as the FBI investigates, the AP reports. Read These Next At least 10 dead in mass shooting in small Canadian town. The world says its final goodbye to Dawson Leery. Nancy Guthrie's camera footage raises an ancillary question: how? Police raided a 'bikini cafe' and arrested 17. Report an error