The Lilywhites had to come from a goal down this evening at Oriel Park
Dundalk have gone eight points clear at the top of the Airtricity League Premier Division.
The defending champions recovered from conceding after just six minutes to beat Derry City 3-1 at Oriel Park tonight.
Goals from John Mountney, Brian Gartland and Dave McMillan means that Dundalk have opened-up a cushion over title rivals Cork City who play Sligo Rovers tomorrow.
Bohemians were 1-0 winners over Longford Town at Dalymount Park. Across the city, Shamrock Rovers moved up to third place after a 4-2 victory over Galway United at the Tallaght Stadium.
Wexford Youths' hopes of avoiding relegation have suffered a blow after a 3-1 loss to Bray Wanderers
Tonight's other Premier Division fixture between Finn Harps and St. Pat's had to be postponed because of an unplayable pitch at Finn Park.
In the First Division, Cabinteely were 1-0 winners over Drogheda United and the other two fixtures both finished in 1-all draws as Athlone Town and UCD cancelled each other out and Shelbourne and Limerick shared the points at Tolka Park.