FBI Director Christopher Wray says the bureau is “concerned about the possibility” of Russian attacks on critical U.S. infrastructure targets. Wray’s comments came Tuesday during an appearance before the Detroit Economic Club and echoed President Joe Biden’s warning a day earlier. “We are, of course, concerned about the possibility, as the president said, of the Russians, whether it’s their intelligence services or cybercriminal groups working with them, targeting U.S. critical infrastructure, either in retaliation for our sanctions or for some other means,” Wray said in Detroit. President Joe Biden on Monday urged U.S. companies to make sure their digital doors are locked tight because of “evolving intelligence” that Russia is considering launching cyberattacks against critical infrastructure targets as the war in Ukraine continues. The federal government has been warning U.S. companies of the threats posed by Russian hackers well before the invasion of Ukraine last month. And Wray doubled down …