RedactedNarrative: I was dispatched in reference to an unrelated call. During the unrelated call I was approached by a bystander who stated two jet skis collided into each other next to Zoo Island and a woman has a broken leg. Upon arrival I observed a woman in extreme pain and a leg that was swollen. I immediately got her on the Yuma County Vessel and transported her to the Sub-Station. After I dropped her off with Rural Metro, I went back to the scene, however everyone involved had left. I attempted to make contact with the other party''s involved, however, I had a negative contact for the past week with both party''s involved.