Firefighters have been called to tackle a blaze at the Palm Paper factory, on the edge of Lynn, this afternoon.
Crews were called to Poplar Avenue at around 1.30pm today. At its height, five engines, including a unit from Downham and an aerial ladder platform, were at the scene.
A Norfolk fire service spokesman said the last crews left the scene shortly after 3pm.
The incident is the second serious blaze to strike the plant in a few months, following a major incident there last October.