Four teenagers have been arrested following a spate of aggravated robberies and ram raids across the Waikato recently.

Armed police raided a number of Hamilton and Ngaruawahia properties this morning as part of 'Operation Overflow'.

Stolen vehicles and property, firearms, and a cannabis growing room were found.

Three teens, aged 14-16, will face charges in the Hamilton District Youth Court relating to aggravated robbery, burglary, unlawful taking of a motor vehicle and participating in an organised criminal group.

An 18-year-old man is facing charges of burglary, participating in an organised criminal group, unlawful taking of a motor vehicle and receiving stolen goods. One other youth will be referred to Youth Aid.

The group are alleged to have robbed three Hamilton dairies in February as well as being involved in two ram raids at Stirling Sports Te Awamutu on January 19 and February 27 and another at the Mobil petrol station in Huntly on February 22.

Detective Sergeant Terri Wilson of the Hamilton CIB says the arrests are "great result."

She says police will be working hard to reunite owners with stolen property in the coming weeks.

'We'd really like to thanks the members of the public who have come forward with information to assist in our investigations into these robberies. Your information has been invaluable.”

Anyone else with information about these crimes can contact Hamilton police 07 858 6200 and ask to speak with the Operation Overflow team.

Information can also be given anonymously via Crimestoppers 0800 555 111.