Those were the words of Inspector Matthew Hinton of Yass Police station at 5.30pm.

Nanima residents were earlier advised to secure their vehicles and properties.

Despite believing the offenders are no longer in the Nanima area, police still "urge all residents to be vigilant and report any suspicious behaviour to police," Inspector Hinton said.

No roads are affected.

A male and female in their 20s allegedly set fire to a car at 186 Mundays Lane in Springrange before fleeing.

The vehicle failed to stop for police after allegedly speeding on the Hume Highway near Goulburn, Inspector Matthew Hinton of Yass Police Station said.

A police pursuit began, following the vehicle down Gundaroo Road, Gunning.

The police used road spikes, however, the car managed to avoid them, Inspector Hinton said.

Gunning Motors employee Lizzy Veasey witnessed two police cars chasing the vehicle at pace as they passed through the village of Gunning.

The pursuit was terminated until police received reports of a car fire on Mundays Lane.

The offenders were seen leaving the vehicle, heading towards the Nanima area, Inspector Hinton said.

A police operation is underway.

The car fire was extinguished by Springrange and Wallaroo Rural Fire Brigades about 1.40pm.

The vehicle was fully involved in flames and started a small grass fire.

No patients were reported.

Police are calling for anyone who sites the couple to contact Yass Police Station on (02) 6226 9399 or Crime Stoppers on 1800 333 000.