Suffolk police are investigating a rash of thefts that a spokeswoman said was the result of “a lot of unlocked vehicles and some very busy thieves.”

At least 27 people reported Monday and Tuesday that items in their vehicles had been sorted through or stolen. Most of the incidents happened in the Steeplechase and Harbour Breeze neighborhoods, city spokeswoman Debbie George said.

The thieves opened unlocked vehicles and sorted through items left in the glove compartments and center consoles, according to the police report. In some cases, they took nothing. But in other cases, they stole small electronics such as global positioning system devices and MP3 players, and various other items such as sunglasses, pocketknives and loose change.

Police have no suspect description at this time, George said.

“We encourage all of our citizens to secure their vehicles and remove their valuables,” she said.

Anyone who saw anything suspicious in the targeted neighborhoods is asked to call Crime Line at 1-888-LOCK-U-UP. Callers to Crime Line never have to give their names or appear in court, and may be eligible for a reward of up to $1,000.