UPDATE FRIDAY 7.30AM: POLICE are still looking for the person who unsuccessfully tried to set a mobile speed camera on fire on Wednesday night.

A fire started in the grass around the yellow trailer camera, commonly known as Wall-E, beside the Warrego Hwy at Karalee just before 11pm but the camera was not damaged.

A police spokesperson said the fire was deliberately lit and they were looking at the footage from the camera as part of their ongoing investigations.

Nobody has been charged over the incident.

THURSDAY: POLICE are looking at footage from a mobile speed camera on the Warrego Hwy after a person tried to set it alight overnight.

A fire started in the grass around the yellow trailer camera, commonly known as Wall-E, beside the highway at Karalee just before 11pm but the camera was not damaged.

Queensland Fire and Emergency Services extinguished the small vegetation fire within half an hour.

A police spokesperson said the fire was deliberately lit and they were looking at the footage from the camera as part of their ongoing investigations.