Nazmie-lee Marai clocked 10.84 seconds in winning the men’s event while Toea Wisil retained the women’s title in 12 seconds flat.
Among their other successes, Raylyne Kanam led home a PNG one-two finish in the women’s 400m hurdles final while Debono Paraka took out the men’s discuss with a throw of 49.57m and Roland Hure won gold in the men’s long jump.
Simbai Kaspar took out the men’s 5,000m title, while Sharon Firisua from Solomon Islands added the women’s 5,000m title to her collection.
PNG have 22 gold medals in all but New Caledonia remain on top with 34.
Sylvai Bova won gold in the para men’s 100m, Rose Vandegou won the women’s para shot put while Leina Durand claimed the women’s hammer title with a 43.67m throw.
Athletics continues at Korman Stadium on Wednesday while more gold medals are up for grabs on the tennis courts, with the men’s, women’s and mixed doubles finals to be decided.