(Motherboard) A hacker broke into thousands of accounts belonging to users of two GPS tracker apps, giving him the ability to monitor the locations of tens of thousands of vehicles and even turn off the engines for some of them while they were in motion, Motherboard has learned.

The hacker, who goes by the name L&M, told Motherboard he hacked into more than 7,000 iTrack accounts and more than 20,000 ProTrack accounts, two apps that companies use to monitor and manage fleets of vehicles through GPS tracking devices. The hacker was able to track vehicles in a handful of countries around the world, including South Africa, Morocco, India, and the Philippines. On some cars, the software has the capability of remotely turning off the engines of vehicles that are stopped or are traveling 12 miles per hour or slower, according to the manufacturer of certain GPS tracking devices.

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