Two cars were set on fire in Faringdon Road in the early hours of Saturday morning.
A Vauxhall Zafira and a Ford Fiesta were engulfed in the blaze at about 2.20am and detectives are searching for the person responsible.
Det Con Gareth Suffling said: “Due to the proximity of one of the vehicles to the house the fire caused some damage to the gas main. Luckily the occupants of the house were still awake and due to their quick response the emergency services attended the scene and extinguished the fire. Thankfully no one was injured but this is clearly a very serious offence which could have resulted in a very different outcome.”
Anyone with information relating to this crime can contact DC Suffling at Luton Police Station, in confidence, on 01582 394317, or Bedfordshire Police on 101, or text information to 07786 200011.
Alternatively contact the independent crime fighting charity Crimestoppers, anonymously, on 0800 555 111.