A man has driven a car laden with gas bottles into an underground carpark of Merrylands police station.

It is understood the bottles did not detonate in what is suspected to be an attempted terror attack on the Western Sydney police station, known to be a target for Sydney’s radicals.

The police have apprehended the driver and he is being questioned by police.

Nobody was injured.

.@NSWPolice say a man is in custody after a car rammed #Merrylands Police Station. Here is the latest https://t.co/aJCEW14PXG

— ABC News 24 (@ABCNews24) July 21, 2016