New Zealand police will be on guard against letting any Australian gangs set up shop here, Police Minister Judith Collins says.

You probably don't want to mess with Luigi 'Baby Shacks' Manocchio, who has just pleaded not guilty to charges of extorting cash 'protection' payments from New England's strip clubs.

A Mongrel Mob member has had his gang patch destroyed in a landmark court ruling.

Three Mongrel Mob members were arrested in Hastings last night after one assaulted a woman and the other two stopped police from doing their job.

There is extra security at Gisborne Hospital following a gang brawl between Black Power and the Mongrel Mob last night.

Mongrel Mob members huddled together and barked like dogs as a child's body was removed from the water.

The mother of a murdered Bay of Plenty teenager said today she was unable to describe how she felt about her son's "brutal, absolutely senseless death". A Mongrel Mob member ran down Jordan Herewini in Murupara last year.

Crossbows, $20,000 cash, methamphetamine and a Harley Davidson motorcycle were among goods seized during a series of police raids on Hells Angels gang houses in Auckland and Napier this morning.

Seven people have been arrested after drug raids on nine properties including the Hells Angels Auckland HQ today. Police said the raids came on the back of an 'intensive' two month investigation into a Hawkes Bay methamphetamine ring.