A Kambah home was robbed of drugs, money and other items when two teenage boys threatened the homeowner with knives on Tuesday.

Police say the two youths – 16 and 17 – have been charged with various offences following an investigation by officers from Operation Toric after being arrested in Chisholm on Thursday afternoon.

Police allege that later on Tuesday, the 17-year-old made threats to another person by phone in relation to the earlier home invasion.

He has has been charged with joint commission aggravated robbery, threats via a carriage service, possessing an offensive weapon with intent, and breaching a good behaviour order. The 16-year-old has been charged with joint commission aggravated robbery and possessing an offensive weapon with intent.

In a separate incident, Operation Toric officers swooped on a residence in Ainslie following an investigation into a stolen vehicle from August.

During their search, police seized two stolen motor vehicles, two hand-held tasers, knuckle dusters, OC spray, and two gas-powered, firearm-shaped arrow air javelins. Police say charges are expected to be laid at a later date.