South Island police have made three arrests on drugs and obstruction charges after investigating complaints about the drivers of two Mercedes cars.
Canterbury metro commander superintendent Lane Todd said members of the public contacted them saying they saw the vehicles driving dangerously and speeding in Tarras, Central Otago on Sunday.
"The actions of these drivers caused considerable concern for members of the community," he said.
Supt Todd said a police unit sighted one of the cars, which they believed was on its way to Picton, however it failed to stop when signalled to do so.
"At about 11:30pm both vehicles were located at an address in central Christchurch. Police completed a search of the property and located two firearms, methamphetamine and cannabis."
Two patched members of the Headhunters MC gang and a gang prospect were arrested.
One of the men, a 47-year-old was charged with possession of methamphetamine for supply and is due to appear in the Christchurch District Court on Monday.
A 33-year-old man has been charged with possession of cannabis and a 37-year-old man with obstructing Police. They are both due to appear in the Christchurch District Court on Wednesday.
Supt Todd said police are "pleased with the outcome" and are considering further charges.
Both Mercedes vehicles have since been impounded.