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Merck hit by cyberattack

 This Thursday, Dec. 18, 2014, file photo shows the Merck logo on a stained glass panel at a Merck company building in Kenilworth, N.J. (AP Photo/Mel Evans, File)

This Thursday, Dec. 18, 2014, file photo shows the Merck logo on a stained glass panel at a Merck company building in Kenilworth, N.J. (AP Photo/Mel Evans, File)

The second-largest drugmaker in the United States is confirming it’s been affected by a cyberattack.

In a message sent using its verified Twitter account, Merck confirmed Tuesday that its computer network was “compromised” as part of a global attack.

Officials said the Kenilworth-based company was investigating the incident but provided no further details.

Merck has global locations including in Ukraine, where a new and highly virulent outbreak of malicious data-scrambling software causing mass disruption across Europe appeared to be hitting especially hard.

Company and government officials reported serious intrusions at the Ukrainian power grid, banks and government offices, where one senior official posted a photo of a darkened computer screen and the words, “the whole network is down.”

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