DERRY City made it two victories in a week following this clash against Bohemians at Dalymount.
Second-half goals from Stephen McLaughlin and Patrick McEleney gave Declan Devine's side a two-goal lead as Keith Ward scored a late consolation goal for Bohs.
The visitors went close on 10 minutes as McEleney's long-range effort flashed past the post. Bohs had a chance to break the deadlock after the interval, but Ward failed to capitalise on Ruaidhri Higgins' sloppy pass and his side-footed effort from close-range was easily saved by Ger Doherty.
Derry took the lead on 64 minutes when Dermot McCaffrey's free-kick was headed home at the near post by McLaughlin.
Bohs boss Aaron Callaghan was fuming that his side were unable to bring on a substitute just before McLaughlin's goal and the manager was subsequently dismissed.
Derry doubled their lead on 78 minutes from the penalty spot after Bohs skipper Evan McMillan handled inside the area, while McEleney made no mistake as Bohs pulled one back in stoppage-time when Ward chipped in a free-kick from the edge of the box.
Bohemians -- Sexton, Pender, McMillan, Feely, McCabe (Wilson 65), Buckley, Ward, Mulcahy, McEvoy, O'Connor (Scully 77); Moore.
Derry City -- Doherty, Madden, S McEleney, McBride, McCaffrey; Morrison (Barr 83), P McEleney, Higgins, McLaughlin; McDaid, Patterson (Curran h-t).
REF -- R Rogers (Dublin).