Police have refused to comment on reports one of the alleged offenders put a gun to the chest of a victim during the incident.

Detectives from Taskforce Wayward arrested and charged two teenagers in relation to the incident last Wednesday and are now seeking the other three.

Police are urging the public not to approach the boys - who are believed to be in hiding in the Collingwood, Sunshine or Melton areas - and to instead call police.

"We do believe them to be together, particularly in the Collingwood area so we would ask residents in and around that area to be vigilant," Detective Senior Sergeant Brett Kahan said on Tuesday.

"They are actively avoiding police apprehension. The home invasion in question was a particularly concerning crime and it involved elderly victims ... that's certainly one of the reasons we have come to this step today."

Detective Senior Sergeant Kahan would not comment when directly asked about any prior alleged offending by the trio, but later said "there are a number of ongoing investigations" surrounding them.

Police were able to identify the alleged offenders so quickly because one of the trio on the run was known to them via the Taskforce Wayward program, in which police monitor youth offenders in Melbourne's west.

Investigators also don't believe the boys have been home and it's understood their parents were all extremely distressed.

Those involved with the case believe it is "unprecedented" for the Children's Court to grant such an order, so much so that police were shocked at the decision.

An 18-year-old Melton West man faced Melbourne Magistrates’ Court last Wednesday charged with aggravated home invasion and theft of a motor vehicle. He was remanded to face court again on December 10.

A 16-year-old Glenroy boy was also arrested last Wednesday and faced a children’s court charged with aggravated home invasion and theft of a motor vehicle. He was remanded to a later date.

The Wyndham Vale area, which also includes the suburbs of Manor Lakes and Mount Cottrell, has among the highest rates of aggravated burglaries in Melbourne.

There were 14 residential aggravated burglaries in the area in the 12 months to June this year, Crime Statistics Agency data shows.

A burglary is classified as aggravated by police if the resident was inside the house at the time the address was being targeted, but it does not mean the victim came into direct contact with the crook.

Home invasions are where a group of assailants carry out a home burglary and often go out of their way to antagonise the occupant.

However, it is not possible to determine how many of those aggravated burglaries were home invasions, because the Crime Statistics Agency does not differentiate between those crimes in their latest yearly figures.

In addition to the 14 aggravated home burglaries in Wyndham Vale there were 97 non-aggravated home break-ins.

- with Tammy Mills, Simone Fox Koob and Craig Butt