The word's "you're dead", and "die, die" have been spray-painted on the front of a house targeted in an apparent arson attack south of Brisbane.

Detectives will head to the scene of the fire in the Logan suburb of Woodridge on Monday.

Police have not confirmed a media report that said seven children may have been alone at the house when the fire broke out.

'FU YOR DEAD': Police investigating suspicious fire in Woodridge https://t.co/HgaJBBwfDw pic.twitter.com/TxeFxvangp

— Brisbane News (@BrisbaneBrk) July 16, 2017

Footage from the scene shows the threats sprayed in large black letters on the front of the low-set timber home.

The fire broke out at about 11.45pm on Sunday.

The fire service told AAP it was quickly extinguished and caused minor damage, with the incident referred to police.

The ambulance service said no-one at the scene required medical help.

AAP