Reporters and Clinton's rivals as she campaigns for the 2016 Democratic presidential nomination began scouring 7,000 additional pages of messages from the mails she handed over earlier this year after coming under fire for operating the unofficial server.
But perhaps the greater danger to her, with no smoking gun emerging immediately as the hunt began, lay in the mails which officials said had now seen their security status upgraded to "classified" or above, implying they should not have been sent.
Last month, officials said that 63 other mails had also been "upgraded in some form."
Clinton has been criticized for using a private server rather than an official government domain for all her emails during her time at the State Department.
Critics allege that she used the so-called "homebrew server" -- physically located in the bathroom of a private Internet provider -- to avoid political scrutiny of her time as the top US diplomat.
They also charge that she put national security at risk by taking classified information out of supposedly secure government systems and putting it onto an unauthorized network that could be prey to hackers.
If the probe reveals that classified or secret information was shared on un-secured networks or with individuals without a security clearance, Clinton or her staff could face legal consequences.
Toner confirmed that the review, being overseen by the Intelligence Community Inspector General, has so far found no mails directly marked "classified."
But while the material reviewed so far was not marked "classified," the number of mails containing sensitive information that are now in hindsight thought worthy of classification is on the rise.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
