The rash of summer vehicle break-ins across Washtenaw County continued this weekend, with more than nine reports of larcenies and one attempted break-in — including five in Ann Arbor.

The incidents come on the heels of a string of vehicle break-ins in Scio Township, Lodi Township, Ypsilanti Township and Superior Township reported last week. Now, police in Ann Arbor, Pittsfield Township and Ypsilanti Township are reporting more break-ins from the weekend.

Washtenaw County Sheriff’s Office Sgt. Geoffrey Fox said it’s not unusual to see an increase in vehicle break-ins during summer.

“Some of them are crimes of opportunity, people leaving cars unlocked,” he said. “It comes and goes, there’s no rhyme or reason. It’s one of those crimes you’ll see a rash of and then you won’t for a while. They pop up here and there.”

The first few vehicle break-ins from the weekend came in Pittsfield Township and southern Ann Arbor.

The first three reports of vehicle break-ins came from Pittsfield Township on Friday. According to CrimeMapping.com, a vehicle was reported broken into at 9:28 a.m. Friday in the 4300 block of Woodstream Drive.

Later on that day, two vehicles were reported broken into in the 4100 block of Carpenter Road. The first report came in at 8 p.m. and the second report was made at 11:22 p.m., according to CrimeMapping.com

More vehicles were reportedly broken into nearby in Ann Arbor a few hours later.

In Ann Arbor, the first incident took place between 11 p.m. Friday and 7:50 a.m. Saturday in the 2500 block of Braeburn Circle. According to police, an unknown person broke a window out of a parked vehicle and stole a CD/DVD player.

Between 1 and 10 a.m. Saturday, four vehicles parked in the 3500 and 3600 blocks of Partridge Path in Ann Arbor were broken into, according to police. Stereo/GPS units were taken out of the dashboards, police reported.

An attempted larceny from vehicle also was reported at 2:53 a.m. Saturday in the 2900 block of Birch Hollow Drive, according to Ann Arbor police. An unknown person attempted to remove the stereo/GPS unit from the car but did not succeed.

AnnArbor.com could not immediately reach police officials from Ann Arbor and Pittsfield Township for comment on the cases.

During those same overnight hours, several vehicles parked in the 8800 block of Brookwood Street in Ypsilanti Township were broken into, Fox said. Those incidents are believed to be related.

In all of the incidents, vehicle windows were broken out and various items were stolen. Radios, GPS units and other miscellaneous items were reported stolen, Fox said.

Fox said the thefts in Ypsilanti Township did not appear to be related to the incidents reported last week.

“It sort of seemed random,” he said. “The items that were taken just happened to be there, it’s not like these cars were targeted for anything special.”

Suspect descriptions in the cases were not available.

Anyone with information on these break-ins is encouraged to call the Ann Arbor police anonymous tip line at 734-74-6939, the Pittsfield Township police at 734-822-4911, the Washtenaw County Sheriff’s Office anonymous tip line at 734-973-7711 or Crime Stoppers at 1-800-SPEAK UP (773-2587).

Kyle Feldscher covers cops and courts for AnnArbor.com. He can be reached at kylefeldscher@annarbor.com or you can follow him on Twitter.