Three fire engines have been sent to tackle a blaze at a derelict mill in Oswaldtwistle.
The fire is believed to have started just before 6pm on Thursday.
Initially, two fire engines from Hyndburn were called to the incident, but at 6.10pm, the stinger from Blackburn was also deployed to help battle the flames from height.
Just over a year ago, crews worked through the night to battle a similar fire in what is thought to be the same location.
Crews work through night to tackle fire at derelict Oswaldtwistle mill building
It is not yet known the extent of the damage caused to the mill, but crews have been in attendance at the incident for more than two and a half hours.
It is not thought anyone has been injured as a result of the fire.
The fire service have been contacted for a statement.