Police yesterday raided four properties in Birmingham as part of a nationwide crackdown on drug dealers and thieves.
The four properties were among more than 50 homes across the country to be targeted by more than 600 officers and staff.
The dawn swoops, which were part of an operation codenamed Phoenix, was headed by Hampshire Police.
A spokeswoman said 48 properties in Southampton were entered and 31 arrests made for drug and theft offences. Armed police were used in some of the raids. There were no arrests in Birmingham, or in a dawn raid that occurred simultaneously in London.
A Hampshire Police spokeswoman said: "The arrests so far have been for a variety of suspected drug, theft and other offences. Those detained have been taken into custody at police stations across Hampshire.
" Simultaneous to the Hampshire raids, four search warrants were executed at addresses in Birmingham, two in the Handsworth area. No one was arrested.
"A further search warrant was conducted at an address in the Catford area of London. The search related to a property used by a man from that area who was arrested at an earlier date in Southampton in connection with the same investigation.
"As well as the arrests, a significant amount of drugs and cash has been recovered, plus substantial quantities of suspected stolen goods."