Motorists are being urged not to leave valuables on display when they park.
Three cars were targeted by thieves in Kings Road South, High Street East, and Carville Road, all in Wallsend, last week.
Now police are reminding people to remove valuables when they park to prevent opportunist thefts.
Neighbourhood Inspector Mark Storey said: “Unfortunately opportunist criminals are looking to steal property left in plain view from parked cars.
“If they see valuables left inside a car they’ll try the door handle, if it’s locked they’ll smash a window to get inside to steal.
“This means motorists are left having to literally pick up the pieces, get their vehicle repaired as well as replacing the stolen item, which makes it both an annoying and expensive matter.
“We’re reminding drivers to remove all valuables when they park, or to keep them out of sight in a locked boot .”
Neighbourhood officers have stepped up patrols in the affected areas to reassure local people and to deter further criminal activity.
Officers are also appealing for witnesses and if anyone has any information about these recent crimes then contact officers on 101 quoting reference 012986K/17.
Anyone who sees any suspicious activity around parked cars should call 101.