Sen. Mark WarnerMark Robert WarnerHillicon Valley: Twitter tightens rules before election | Intelligence chief briefed lawmakers on foreign influence threats | Democrats launch inquiry into Pentagon’s moves on a national 5G network Senate Democrat raises concerns around Universal Health Services breach Hillicon Valley: Congressional antitrust report rips tech firms | Facebook tightens ban on QAnon content | Social media groups urged to weed out disinformation targeting minority voters MORE (D-Va.) on Friday raised concerns around a recent cyberattack on hospital chain Universal Health Services (UHS) that resulted in the data of millions of customers potentially being compromised. 

In a letter to UHS Chairman and CEO Alan Miller, Warner, who serves as vice chairman of the Senate Intelligence Committee, asked a series of questions in relation to a ransomware attack on UHS last month that crashed systems at hospital facilities across the nation. 

UHS has more than 400 facilities in the U.S. and United Kingdom, with more than 90,000 employees, and it has previously stressed that there is no evidence any data was stolen or accessed. NBC News reported last week that the incident…

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