Vans packed with officers from Surrey police swooped into Feltham and Isleworth yesterday to execute dawn raids at nine properties.
The warrants, which also covered addresses in Wokingham, led to 12 arrests for burglary and drug-related offences carried out across the county border in Surrey.
They were part of Operation Shield, launched in Surrey last week to tackle offenders who live outside the county.
Tuesday's activity focused on a gang suspected of committing burglaries across north Surrey to steal electronic goods and keys for cars parked outside victims' homes.
Superintendent Charlie Doyle, who led the raids, said: "We want to send a strong message. If we suspect you're committing crime in our county, we will identify you, target you and arrest you regardless of where you live."
The twelve arrests included three 16-year-olds, an 18-year-old, a 35-year-old and a 36-year-old from Feltham, all arrested on suspicion of burglary.
A 19-year-old man from Isleworth, a 24-year-old man from Hanworth and a 17-year-old boy, produced from Ashford Prison, were also arrested on suspicion of burglary.
And a 37-year-old woman from Feltham was taken in on suspicion of handling stolen goods while a 34-year-old homeless man was arrested on suspicion of possession with intent to supply Class A drugs.
Everyone picked up during the raids will now be interviewed and the Crown Prosecution Service will advise whether to charge or release them.