Leaked NSA tools used in global cyber attack, analysts say

Hospitals in England and at least one major U.S. company are among those hit.
1:40 | 05/12/17

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Transcript for Leaked NSA tools used in global cyber attack, analysts say
I follow that developing story a massive worldwide cyber attack hitting dozens of countries right now and it is severely disrupting Britain's public health system. Eyewitness News reporter Joseph Torres is in the newsroom and joke is they US impacted. Well sure they know. At least not yet this cyber attack has impacted as many as 74. Countries. And it has crippled some hospitals in the United Kingdom that word cripple today from the British prime minister Teresa may. The rain somewhere attack froze hospital computers it closed emergency rooms and effectively brought medical treatment to a screeching halt and on the hospital's frozen computer screens a payment demand before attackers release the date up. Authorities did say there is right now no evidence the attack compromise patient date or records. But that's little comfort to the many people impacted by the widespread. Cyber attack. Just people who write this we've had that was they pay off heat and people often see a doctor anyhow. And then an announcement came back at me over these with doubt until at least Monday. Of the among some of the 74 countries impacted by this attack telecommunications. Companies and Spain. Were hit as well authorities in Romania said they intercepted in attempted cyber attack on a government institution there. And in Russia Russia may be the hardest hit with a its interior ministry coming under attack. Lastly security experts say hackers used the tool stolen from the United States government to conduct this cyber attack. The tool was developed by the National Security Agency.

This transcript has been automatically generated and may not be 100% accurate.

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