WINTERS, (AP) — Authorities say a 20-year-old student at University of California, Davis drowned in a weekend rafting accident in Yolo County.

 Lisa Sayaka Nakamaru was rafting Sunday in Putah Creek when she and a friend fell into the fast-moving waters.

The friend made it to shore with minor injuries, but Nakamaru could not be found. She was eventually spotted by other rafters, trapped against rocks underwater.

Firefighter-rescue swimmers pulled Nakamaru from the water. She was pronounced dead at the scene.

Winters Fire Chief Aaron McAlister says the women encountered “aggressive rapids” and the raft became entangled in vegetation overhanging the water.

The newspaper says Nakamaru, a human relations major from Torrance, entered UC Davis in fall 2012.