BOSTON (CBS) – A fire tore through a triple decker in the Mission Hill section of Boston Sunday morning, leaving several people homeless.

Four people lived on the top floor of the home on Hillside Street. One was taken to the hospital for smoke inhalation, but the Boston Fire Department said nobody was badly hurt.

The bottom two units were empty.

The fire department said the cause of the blaze was a cigarette that wasn’t put out properly.

The damage was estimated at $300,000, according to the fire department’s Twitter account.