SAN FRANCISCO — Three man have been charged with either selling methamphetamine or guns to undercover federal agents, including one Oakland man who allegedly used his houseboat on the Oakland marina to peddle firearms and brag about his knack for making customized bullets.

In two federal cases, prosecutors have charged Aleksandr Akopov, Jacob Horowitz, and Vadim Kazakevich with federal offenses related to an undercover ATF and DEA investigation based in Oakland and San Francisco. While Horowitz is set to go before a judge for a detention hearing on Thursday, Akopov and Kazakevich have already been released from custody, despite efforts by prosecutors to first have them jailed, then to overturn a judge’s initial decision to free them.

Akopov is charged with being involved with both firear

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