A dominant Raffles Institution (RI) stormed to four team titles at the National Schools Cross Country Championships on Tuesday morning at Bedok Reservoir Park.

The RI boys made a clean sweep of the A, B and C division titles while the school's A division girls clinched its respective championship as well. This is the first time the school had made a clean sweep at the national championships.

RI's domination extended to the fastest times recorded for the boys and girls.

Shohib Abdul Wahab Marican, a 17-year-old first-year student, recorded the best timing for the boys when he finished the 5km course in 14min 2.8sec.

The fastest girl was Mary-Lisa Chua, a 18-year-old second-year student, was the fastest over 4.3km with a time of 14:21.2.

Victory was especially sweet for Mary-Lisa. She was placed 50th in her first cross country race six years ago as a Secondary 1 student at Raffles Girls' School but not only was she the fastest girl this year, she also captained her school to the A division girls' title.

She said: "As the team captain, I'm very proud because they ran the best the could. Anything could have happened but it feels quite good to win."

A division

Boys' team: 1. RI 2. Victoria JC (VJC) 3. Hwa Chong Institution (HCI)

Girls' team: 1. RI 2. VJC 3. HCI

B division

Boys' team: 1. RI 2. Anglo-Chinese School (Independent) 3. SJI

Girls' team: 1. River Valley High School (RVHS) 2. Cedar Girls' Secondary (CGS) 3. Raffles Girls' School (RGS)

C division

Boys' team: 1. RI 2. HCI 3. ACS(I)

Girls' team: 1. CGS 2. RGS 3. RVHS