Police are appealing for witnesses after a spate of thefts from cars in Piddinghoe and Newhaven.
Vehicles in Brookside, Shepherds Close, Cedarwell Close, and Fullwood Avenue were targeted.
Police said thieves made off with small items including CDs, small amounts of money and a sat nav system was also stolen.
Police believe the thefts happened late on Monday (January 12) or early on Tuesday (January 13).
Bill Pierce, who lives in Cedarwell Close in Piddinghoe, said his car was accessed by intruders and searched but nothing was taken.
He said: “I came out of my drive and saw two men parked up in a van.
“They said they were police and had been called out because of a car being broken into.
“I looked in my car and could see lots of rubbish in there as if they [thieves] had been looking through the car.
“They had been in my car as well.
“I looked and nothing has been stolen.
“I was asked to call 101 to report it.
“They knew all about it and police said I was the third person to report a break in.
“But there could have been more by now.
“Nothing was taken from my car, I think they were just looking for bits of money, cash.
“They didn’t come up my drive as the security light did not come on.”
Police are asking people who may have seen anything suspicious, or have any information about the incident to get in touch.
A spokesman for Sussex Police said: “We were called by a number of people on Tuesday (January 13) reporting that their vehicles have been searched by an intruder in Piddinghoe and Newhaven.
“We have had reports of vehicles in Brookside, Shepherds Close, Cedarwell Close and Fullwood Avenue being entered and small items including CDs, small amounts of money and a sat nav system have been stolen.
“The thefts have happened late on Monday January 12 or early on Tuesday January 13.
“Anyone with information should email firstname.lastname@example.org quoting serial 235 of 13/01.”
Witnesses can also call Sussex Police with information on its non-emergency line 101 or contact the independent charity Crimestoppers anonymously on 0800 555111.