(Bloomberg) -- The FBI has high confidence the Russian government hacked U.S. Democratic Party groups, according to a person familiar with the findings who asked not be identified in order to speak about an ongoing investigation.

The federal investigation into the hacks has expanded based on evidence that other Democratic-affiliated groups were targeted in addition to the Democratic National Committee and the Democratic Congressional Campaign Committee. That includes the likelihood that personal e-mail accounts of party groups and officials were breached, the person said.

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