3-alarm fire erupts at office building in Maple Shade, New Jersey

MAPLE SHADE, N.J. (WPVI) -- No injuries were reported after a fire in Maple Shade, New Jersey grew to three alarms.

Chopper 6 was over the scene on the 1000 block of Maplewood Drive.

Investigators say the fire broke out at the office building around 5:45 a.m.

The fire was placed under control less than an hour later.

It's not yet clear what sparked the fire.