Police in Charleston have closed off portions of a major downtown street while they investigate a suspicious package.

Police say customers at a coffee shop noticed the package in some bushes outside an office building on Calhoun Street before 9 a.m. and called authorities.

Police say the device is attached to a cell phone.

Police say some classes at the College of Charleston have been canceled as a result of the suspicious package.

Calhoun Street has been shut down between King and Pitt Streets.