Armed police have stopped a ute travelling on State Highway 1 in Canterbury and arrested a man on drugs charges.
Police said they set up an "armed roadblock" in Woodend and used road spikes to stop the black Mazda ute, which had two people inside the vehicle.
They said methamphetamine was recovered from the vehicle and tests were being conducted on what was believed to be LSD.
The passenger, a 26-year-old man, will appear in the Christchurch District Court tomorrow on drugs charges including possession of methamphetamine for supply.
The female driver has been released without charge.