Police raid Mongols MC South Island headquarters in Canterbury

Police also visited the South Island headquarters of the Mongols MC gang in July last year. Photo / George Heard

One person has been arrested and drugs and ammunition have been seized following a raid of the South Island headquarters of the Mongols MC gang in Canterbury.

Police executed the search warrant this morning and said in a statement a 34-year-old man has been charged with "a range cannabis-related offences and an ammunition possession charge".

He appeared in the Christchurch District Court this afternoon.

Police and the armed offenders squad searched the property on Main South Rd in Burnham, south of Christchurch, this morning.

State Highway 1 was also blocked at Burnham in both directions earlier but has since reopened.

Ammunition and drugs were also located during the search, police said.

There have been a number of pre-planned search warrants executed at the property previously.

"Police have already warned that we are stepping up our enforcement and disruption of unlawful gang activity across the country, and will continue to do so as Operation Cobalt rolls out," Detective Senior Sergeant Craig Johnson said.

"That means conducting search warrants and making arrests for any identifiable offences.

"Our message to those involved is clear. The community expects a zero tolerance for any violence, gang and drug activities."

Operation Cobalt is a police "gang taskforce" aiming to crackdown on gang turf wars and illegal firearms.

In December 2020, money, a stolen vehicle and a gun were seized by police as part of a search of the Mongols' Canterbury headquarters.

One person was arrested for breach of bail.