Apple has blocked two well-known iPhone hackers from accessing the iTunes App Store.
Sherif Hashim, who developed a hack for the latest iPhone OS 3.1.3, revealed in a tweet that when he tried to access the store he received a message stating his Apple ID was "banned for security reasons".
Shortly afterwards, iH8Sn0w, the developer of Sn0wbreeze - a tool to jailbrake iPhones, revealed on Twitter that he had received the same message.
The move raises concerns that Apple may ban all jailbroken iPhones from accessing the App Store.
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