A woman was allegedly assaulted and a fire started at a home in Grange Park, say police.
Emergency services were called to reports of a fire on Shipley Close at around 9am on Monday, June 11.
Read more stories: Blackpool man who left fiancee blind in one eye has jail term cut
Firefighters arrived to find the occupants of the house were outside and the fire had already been extinguished.
A spokesman for the police said: "Emergency services attended and the fire was extinguished. Only minor damage was caused.
"A woman received minor facial injuries after reporting she was assaulted."
A 45-year-old woman from Blackpool has been arrested on suspicion of arson, assault and affray.