Thousands of dollars in cash, thousands of dollars worth of methamphetamine, gang clothing and loaded guns have been seized in a police raid on a Christchurch gang pad, where children were present.

Cash seized in Sumner raid. Source: NZ Police

Police say the Armed Offenders Squad executed a search warrant on a Sumner address today where they located gang clothing, more than $50,000 cash, four firearms (of which three were loaded), a stun gun and 345g of methamphetamine with an approximate street value of $345,000.

Drugs seized in Sumner raid. Source: NZ Police

Police also seized thousands of dollars' worth of assets.

A 31-year-old man has been arrested and is due to appear in Christchurch District Court today.

Guns seized in raid. Source: NZ Police

Sergeant Chris Barker, of the Canterbury Offender Prevention Team, said of particular concern were the loaded firearms in the property's main living area.

"This is a house in which children were present, and it was very concerning to find these weapons in easy reach.