Oakland Post Editor Chauncey Bailey was gunned down this morning in downtown Oakland by a masked man who ran to a waiting van and drove off, police said. The shooting happened about 7:25 a.m. in the 1400 block of Alice Street. MediaNews reports that police have no motive for the killing, except that it appeared to be a deliberate attack, and no suspects have been arrested. Bailey, 57, had been a reporter at the Oakland Tribune for 12 years and was named editor of the Oakland Post a few months ago.