A couple from Renfrewshire are being treated in hospital after their front door was set on fire.
The 50-year-old woman and 66-year-old man were at their Cumbrae Road home in Renfrew when the blaze broke out around 11.30pm on Friday.
Emergency services attended and they were taken to the Queen Elizabeth University Hospital in Glasgow.
They were both assessed for smoke inhalation and are due to be released after their treatment.
Detective Constable Lauren McGill said: “Deliberately starting fires is a reckless act and we are appealing for anyone with any information to get in touch.
“Anyone who may have seen any suspicious activity, witnessed the incident, who has dashcam footage or private CCTV is asked to get in touch.”
Anyone with information can contact police via 101 quoting incident number 4403 of May 22 2020, or call Crimestoppers on 0800 555 111, where anonymity can be maintained.