Burglars broke into a house in Hemel Hempstead and set fire to it in the process.
Police were called by the fire and rescue service at 10.04pm on Friday, July 12 to assist with a fire at a house in Barley Croft.
The house was unoccupied at the time and upon arrival, the emergency services found that a window had been smashed.
Police have confirmed the burglars ransacked the property.
It is believed entry was gained to the house between 4.20pm and 10pm.
Officers are now appealing for information and witnesses.
Detective Constable Katie Stevens, who is investigating, said: “The fire is being treated as arson and while thankfully no one was injured, the consequences could have been fatal.
“I am appealing for anyone who was in the area at the time and might have seen suspicious activity or seen the burglary take place, to get in touch.
“Any information you have, no matter how small it might seem, could be vital to the investigation. If you can help please call the non-emergency number 101, or email me at email@example.com quoting crime reference 41/63498/19.”
Alternatively, you can stay 100 per cent anonymous by contacting the independent charity Crimestoppers on 0800 555 111 or via their untraceable online form at crimestoppers-uk.org