Mikhail Prokhorov

Russian media resignations follow increased pressure

Once a rather stolid operation focused on business news, the RBC group in recent years had become a standout among Russia's constricting field of independent news media. Then came stories that the Kremlin and President Vladimir Putin may have found far too revealing.

Amid a flurry of probes and police raids that targeted RBC and its billionaire owner Mikhail Prokhorov, who also owns the NBA's Brooklyn Nets, three key editors resigned Friday. RBC said in a vague statement that the three had stepped down because they failed to agree with management "on a number of crucial issues."

But that could indicate that management wanted to rein in the reporting, which has...