Local MP Robbie Moore has called on the government to hold landowners to account following a further fire at Dalton Mills last week.
West Yorkshire Fire and Rescue were called to the derelict mill on Dalton Lane shortly after 21:00 GMT on 10 December to respond to another fire at the historic site.
Five crews were sent to the scene from Shipley, Fairweather, Bradford, Illingworth and Stanningley.
The fire was on the fourth floor and crews used an aerial ladder, breathing apparatus, hose reels and jets to extinguish it.
A West Yorkshire Police spokesperson said "enquiries are in the early stages" and encouraged "anyone who witnessed anything suspicious" to inform the police.
In August, two teenagers were convicted of arson in relation to a major fire at Dalton Mills in 2022, which destroyed a significant proportion of the building. There have been several more fires since.
The Crown Estate took responsibility for Dalton Mills after the 2022 fire.
Keighley’s MP Robbie Moore called lack of action to protect the site “completely unacceptable”, arguing the repeated fires are diverting the time of local fire crews.
Mr Moore called on the government to organise a parliamentary debate on protecting derelict heritage assets and holding landowners to account for security at the site.
Responding to Mr Moore's question, Leader of the House of Commons Lucy Powell called the situation "deeply concerning" and committed to releasing a full reply from the government to the MPs question.
Robbie Moore MP said:
“It is completely unacceptable that our hardworking local firefighters had to be called out yet again to deal with another fire at Dalton Mills - something which is happening far too often - with this now being treated as an arson attack.
Dalton Mills has put Keighley on the map for years and the reckless actions of a few individuals has led to the complete devastation of one of our town’s crowning jewels, put a huge strain on West Yorkshire Fire & Rescue Service and has continued to have a lasting effect on local businesses in the area.
In Parliament, I called for a proper debate on how landowners - including the Crown Estate, who have current control of the site - should be held to account to ensure that derelict and dangerous assets like our historic Dalton Mills are properly secured for the purpose of safety but also to try and stop arsonists from getting in..
I have walked around the boundary of the site too many times and seen the boundary fence non existent.
I fear for children getting in and getting seriously hurt.
This simply cannot continue.”
