A suspicious fire in a Fyshwick caravan was put out by ACT Fire & Rescue late on Sunday night.

The fire was reported at about 8.21pm by a patron of the Canberra South Motor Park in Fyshwick.

The occupant had left before emergency services arrived.

Two pumpers, the Breathing Apparatus Van and a commander attended the fire, which was put out quickly.

The fire is considered suspicious and has been turned over to police.

A unit fire in Belconnen on Sunday morning is also being investigated by police.