Family flee firework blaze
Police in Drymen, Stirlingshire, are questioning a 23-year-old man in connection with the incident on Sunday morning.
Chief Superintendent Davie Flynn condemned the "reckless" act, which he said put the family-of-five in danger.
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Hide AdThe parents and three children, who were asleep in their beds, evacuated the home after being woken by smoke alarms.
Chief Supt Flynn, of Central Scotland Police, said: "It is beyond belief that someone would be so reckless as to set off a firework in the direction of a family home in the early hours of the morning while they slept.
"We are currently questioning a 23-year-old man and our inquiries are continuing."
Last week the force launched Operation Alamo, an intiative aimed at tackling anti-social behaviour surrounding the use of fireworks.