While detectives don't have an official vehicle description, an email circulating amongst neighbors says the crooks may be driving rental vehicles.
The message also asks residents to be on the lookout because the burglars may be casing homes before they break in.
Raleigh police said there have been about a dozen break-ins, or attempted break-ins, since July.
"The suspects appear to be coming through either unlocked rear windows or prying the window open on their own," said Frederick Heineman with Raleigh Police.
Some residents said Thursday they're concerned.
"That scares me. It scares me now that I have a little one at home. It makes me a little edgy to hear that's happening, but I guess we'll have to come together and keep an eye out for anything that looks suspicious," offered resident Kiran Sainani.
The thieves appear to be searching for valuable jewelry and electronics. Some break-ins have been foiled when homes have an active security alarm system.