In what the Winters Fire Chief calls "a tragic accident," a third-year UC Davis student drowned Sunday while rafting in Putah Creek. The Yolo County Coroner's Office identified the student as 20-year-old Lisa Sayaka Nakamaru, from Torrance, and confirmed the cause of death was drowning.

She was rafting with a friend just before 2 p.m. when they struck an object and the raft overturned, according to Winters Fire Chief Aaron McAlister. The incident occurred about half way between Lake Solano and Monticello Dam near Fishing Access 4.

While Winters Fire Department was prepared for a water rescue, about 30 minutes after responders arrived, another, unrelated group of a rafters found Nakamaru's body.

Firefighters heard "a commotion near the water" from the group of four men, McAlister said. "They spotted her in the water, trapped, up against something, being held by the current underwater."

Nakamaru was removed from the water where emergency responders determined she was deceased, about an hour after the initial call. Winters had called out additional resources, including Yocha Dehe Fire Department Swift Water Rescue and Yolo County Sheriff's Office Boat Patrol, along with helicopters, to look from air and downstream, but "ultimately it was tragic," McAlister said.

McAlister did not witness any lifejackets on the victim nor her friend that accompanied her. The surviving woman had minor injuries and was evaluated at Sutter Davis Hospital before being released.