Derry City are up to fifth in the SSE Airtricity Premier Division table.
A second half brace from Danny Lafferty helped them to a 3-nil win at home to Drogheda United.
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First Division leaders Shelbourne have dropped points for the second match running.
They were held to a goalless draw at UCD, but neither of their closest challengers could capitalise.
Galway were beaten 3-2 by Cork City at Eamonn Deacy Park.
While Treaty United had Clyde O’Connell sent off in a 4-1 defeat at home to Cabinteely.
Elsewhere, Bray were 3-1 winners at home to Wexford.
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Republic of Ireland internationals Dara O’Shea and Callum Robinson both found the net as West Brom started the Championship season with a 2-2 draw at Bournemouth.