Angus Buhagiar put the Lions ahead after just one minute and Pablo Doffo doubled the score five minutes later.
Meanwhile St. Andrews defeated Dingli Swallows 2-0 in the second game.
Michael Grima and Mark Hyzler scored the goals for Wayne Attard’s side.
St. Andrews lead the way with 12 points, followed by Pietà, Lija and Naxxar on 10, Gudja and Marsaxlokk on 7, Zejtun and Gzira 5, Vittoriosa 4, Birzebbuga and Dingli 3 and Mqabba 2.