World under 20 medallists Bouwaghie Nkrumie of Kingston College and Serena Cole of Edwin Allen, secured the 100 metre titles on Saturday's second day of the Carifta track and field trials at the National Stadium.
Nkrumie sped to a season's best 10.18 seconds to win the Under-20 boys 100 metres ahead of Deandre Daley of Herbert Morrison 10.37 and Hector Benjamin of Jamaica College 10.46 seconds.
Cole turned the tables on fellow World Under-20 medallist Alana Reid of Hydel, clocking 11.18 to win the U20 girls 100 metres.
Reid who beat Cole at the Central Championships recently, was second in 11.24, while Alexis James of Petersfield High took third in 11.44.
Tramaine Todd of STETHS 10.58 seconds, won the Under-17 boys section ahead of Khamani Gordon of Calabar 10.78 and Nathaniel Martin of Jamaica College 10.85.
The Under-17 girls equivalent was won by Natrece East of Wolmer's with 11.86 seconds in a close finish ahead of teammate Tiana Marshall 11.87 and Shemonqie Hazle of Hydel 11.95 seconds.
In the 400 metres, Delano Kennedy of Edwin Allen won the U20 boys section in a sesson's best 46.24 seconds ahead Jasauna Dennis of STETHS who clocked 46.80, while Tyrese Ebanks of Green Island was third in 47.86 seconds.
The Under 20 girls section was won by Rickiann Russell of Holmwood Technical in 52.43 ahead Kaci Ann Powell of Edwin Allen 53.26 and Abigail Campbell of hydel 53.68 .
In the field, World U20 silver medalist Kobe Lawrence completed the double when he threw 60.38 meters to win the Under-20 boys discus.
Lawrence also won the shot put on Friday's opening day. The meet concludes on Sunday.