Police are investigating an arson attack that's destroyed two vehicles and damaged a home in Braybrook, in Melbourne's west this morning.Firefighters and police were called to Royal Road about 3:10am.Officers were told three masked offenders set two vehicles alight, with one of the fires spreading to a nearby townhouse.Both vehicles were destroyed while the property has been left with minor damage.Police said two people were inside the home at the time.They were not injured.A crime scene has been set up as investigations continue.Anyone who witnessed the incident, has CCTV or dashcam footage or anyone who has information that could help police is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.