PRAGUE – Czech police have arrested a Russian hacker suspected of cyberattacks in the United States, officials said on Wednesday. Police said an international warrant for the man, who was not named, was issued by Interpol and that officers cooperated with the U.S. Federal Bureau of Investigation on the case. Hours after the arrest was made public, the professional networking service LinkedIn suggested that the arrest was tied to a 2012 breach of member information. A spokesman for the U.S. Justice Department declined to confirm that or comment on a possible connection. "Following the 2012 breach of LinkedIn member information,...