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.

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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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