COLUMBUS, Ohio – Experts confirm this. Hacker group The person who claimed responsibility for the Columbus ransomware attack last month leaked some of the city’s data on the dark web.

Rhysida claims to have 6.5 terabytes of city data, enough to hold more than 42 million document pages. The group claimed access to surveillance video, building information and personal information of employees.

Nanda Harikumar with cyber watchdog group Falcon Feeds told 10TV that the hacker group released three terabytes of data at 5:30 a.m. Thursday.

Harikumar added that the files available for download Thursday contained personal information of some city employees.

At least since mid-July when technologists realized the city’s infrastructure was under attack.

Columbus Mayor Andrew Guenther said in an earlier interview that he decided to cut off the city from all outside communications on July 18.

Rhysida demanded about $2 million in ransom and gave the city a five-day deadline.

The hackers claimed on Wednesday that they had released about 45 percent of the data. Harikumar said this is a false claim as the data links were broken.

Guenther’s office acknowledged the hacker group’s claim but did not comment further on possible negotiations.

Rhysida extended the original ransom deadline by 20 hours, and Harikumar said the tactic may be to intimidate the government into hoping others will pay.

10TV reached out to the mayor’s office Thursday for additional comment.