A week after it was revealed that a Chrysler Jeep could be hacked and remotely controlled, two U.S. senators have called for the National Highway Traffic Safety Administration to investigate potential widespread risk for consumers.

In a letter to NHTSA Administrator Mark Rosekind, U.S. Sens. Edward Markey (D-Mass.) and Richard Blumenthal (D-Conn.) said they see potential vulnerabilities in auto information and entertainment systems.

“We were deeply troubled to learn that these software defects can be exploited by malicious hackers to potentially wreak havoc on our roads,” the letter states. “These revelations highlight the acute risks now facing modern motorists as automakers continue to connect cars ever closer to the digital world.”

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