Marvel Studios Twitter Accounts Hacked

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Zade Rosenthal/Marvel 2016
The group OurMine is taking credit.

No, this is not part of a viral marketing campaign.

Twitter accounts for some of Marvel Studios' upcoming films were hacked Wednesday, with the group OurMine taking responsibility. 

Accounts for Marvel Entertainment's main Twitter handle, as well as its Avengers, Black PantherCaptain America and Guardians of the Galaxy and Thor franchises fell victim. Shorlty after 9 a.m. PT, they began tweeting messages such as, "Hey, it's OurMine, Don't worry we are just testing your security, contact us to help you with your security contactourmineteam@gmail.com."

As of 9:50 a.m., the tweets had been deleted and it appeared Marvel had regained control of its accounts. 

"We're investigating and taking immediate action to remedy the situation," Marvel said in a statement.

The hacker group has frequently targeted high-profile accounts over the past year, including Netflix's Twitter account earlier Wednesday. In September, the group gained access to Variety magazine's website and email system, sending multiple messages to subscribers with the subject line "Hacked by #OurMine."

Dec. 21, 1:17 p.m.: Updated with statement from Marvel.