Two separate customers at a mini-mart in Livingston left their keys in the ignition with the engine running when they dashed inside around 7:45 a.m.
But when they came out, they found that both of their cars - both Mercedes Benz - had been stolen.
Livingston Police Det. Sgt. Anthony Dippold confirmed that the two luxury cars were taken at the same time from the parking lot of the Livingston Mart on South Livingston Avenue. Dippold said both cars were left running with the keys in the ignition.
A 54 year-old Livingston resident came out of the store to find his black 2011 Mercedes E350 missing and a 28-year-old resident suffered the same fate when he discovered his 2010 white Mercedes C300 was also gone.
Security tapes showed that three men in hoods and possibly masks, pulled up to the scene in a tinted black Lexus, said Dippold. Two of them then got out and took the Mercedes, then all three cars sped north on S. Livingston Ave.
Livingston police put out an alert looking for the stolen vehicles.