Further arrests are expected after police seized a collection of weapons including a military assault rifle and arrested 14 teenagers across Melbourne.

Investigators from the Southern Metro Crime Team swooped on the teenagers while executing warrants over the past two days in Cranbourne, Pakenham, Dandenong South, Officer, Narre Warren South, Clyde North, Cranbourne North and Doveton.

The warrants were executed in relation to a series of alleged incidents which occurred in Melbourne's south eastern suburbs between July 26 and August 7.

The warrants were executed in relation to a series of alleged incidents which occurred in Melbourne’s south eastern suburbs between 26 July and 7 August. (Nine)

This morning a further 10 people were arrested and are currently being interviewed by police. (Nine)

They include:

- An alleged aggravated carjacking in Narre Warren South on 26 July 2018

- An alleged armed robbery at a milk bar in Hallam on 2 August 2018

- An alleged attempted aggravated burglary at a milk bar in Hampton on 2 August 2018

- An alleged armed robbery at a service station in Lynbrook on 3 August 2018

- An alleged armed robbery and carjacking in Moorabbin on 7 August 2018

The weapons allegedly collected included swords, knives, knuckle-dusters, imitation firearms and a weapon police believe to be an AK-47 rifle.

Investigators said they recovered two stolen vehicles, a black Holden Captiva and Landrover Discovery.

Four people were arrested yesterday morning and have been charged with offences including armed robbery, aggravated carjacking and intentionally causing injury.

A military style rifle was found during raids across Melbourne properties. (Nine)

Investigators said they recovered two stolen vehicles in the raids. (Nine)

This morning a further 10 people were arrested and are currently being interviewed by police.

"We want to reassure the community that these kinds of offences are a priority for us and we have been putting a lot of resources into this operation," Detective Inspector Shayne Pannell said.

"We know these kinds of incidents can be a terrifying experience for anyone, which is why when they do occur we commit all of our efforts into identifying and arresting offenders.

"The safety of the community is the highest priority for police and we’ll continue to focus on holding offenders to account whilst maintaining a highly visible police presence in order to prevent crime from occurring."

Police involved in the raids said the investigation was still active and there would be more arrests next week.