Many Twitter users vented their concern and frustration Monday upon learning from a Twitter e-mail that their passwords had been reset due to a possible security issue with a third-party Web site -- an exercise in security triggered by accident.

"Twitter believes that your account may have been compromised by a website or service not associated with Twitter," the e-mail sent to users said. "We've reset your password to prevent accessing your account."

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However, a Twitter spokesperson told CNET that the password reset e-mails had been sent in error.

"We unintentionally sent some password reset notices tonight due to a system error," the company said in a statement. "We apologize to the affected users for the inconvenience."

Twitter did not reveal how many users were affected by the password reset.

This isn't the first time Twitter has unnecessarily reset user passwords. The micro-blogging platform suffered a security breach in November 2012, leading to a mass password reset. However, the company admitted that it unintentionally reset the passwords for a much larger group of users than those actually believed to have been compromised.