Arsonists set fire to an empty house in Stanford Road, Luton on Friday morning.
The incident happened between 2am and 2.30am. Neighbours were awoken by the smell of smoke and called the Fire Service who attended the house and put out the blaze which had caused damage to the front door and hallway.
PC Samantha Shane is keen to hear from anyone who was in Stanford Road at the time of the incident and may have seen anything suspicious.
Contact PC Shane, on the non-emergency number 101, or text to 07786 200011.
Alternatively contact independent charity Crimestoppers, anonymously, on 0800 555 111, or online at crimestoppers-uk.org.