Derry's lead at the top of the Airtricity First Division has been cut to 10 points following a draw with Finn Harps
Mark Farren put City ahead after three minutes with a close-range finish.
Harps were stronger in the second half and their pressure paid off when Packie Mailey headed in on 68 minutes.
Mark Farren got his second and restored Derry's lead whenpounced to score for the Candystripes after good work Pat McEleney.
Harps went on the attack after the break with chances for Tony Shields and Tommy Bonnar before Mailey netted an equaliser from a Jonathan Minnock corner.
Packie Mailey gave this reaction to Diarmuid Doherty after the match: