The garage at the Sheffield house where 34-year-old Craig Kinsella was kept as a slave was set on fire last night.
South Yorkshire Fire and Rescue Service say they attended the blaze after a call at 10.15pm last night.
The garage - which is detached from the main house - was well alight when they arrived. It took just under two hours to bring the fire under control and cool cylinders which were lying nearby. There was no damage to the main house or any adjoining property.
More top news
Former Hull FC star Tom Briscoe scored five tries to see Leeds Rhinos retain the Challenge cup with a record 50-0 win over Hull KR.
Labour leadership candidate says Britain playing its role in the migrant crisis would help Cameron secure the promised reforms in Brussels.
The Rhinos lead Hull KR 16-0 at halftime in the Challenge Cup final.