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LinkedIn Corp has said that the breach may have compromised credentials of 100 million users, prompting it to launch a massive password reset operation.
Now a court will have to decide if the alleged hacker can be extradited to the US.
"Following the 2012 breach of LinkedIn member information, we have remained actively involved with the FBI's case to pursue those responsible. We are thankful for the hard work and dedication of the FBI in its efforts to locate and capture the parties believed to be responsible for this criminal activity,” said LinkedIn in statement released by the company.
Russian news agency Tass has indicated that Russia would fight any extradition attempt.
Czech and U.S. authorities have, however, declined to confirm that the man was a suspect in the LinkedIn breach and charges were being filed against him.
The video footage of a restaurant of a central Prague hotel showed a man arrested without resistance.
Two U.S. officials said the man was not linked to recent political hacks in the United States.