STILLWATER, Okla. — A woman was arrested on a DUI charge after crashing into a crowd of spectators Saturday during the Oklahoma State University homecoming parade, killing four people and injuring nearly three dozen others, police said.

Stillwater police Capt. Kyle Gibbs said the woman's sedan plowed into an unoccupied motorcycle of an officer who was working security at the parade, then into the crowd. The driver of the sedan was taken into custody on a driving under the influence charge, Gibbs said.

Oklahoma University Medical Center and The Children's Hospital announced in a statement Saturday night that a 2-year-old was the fourth person to die from injuries from the morning crash. Five children and three adults remained

hospitalized with conditions ranging from good to critical, officials said. 

Oklahoma State University President Burns Hargis said the homecoming game against Kansas would be played Saturday afternoon.

Dave Kapple of Houston told the Stillwater News Press that he and his son were about 10 feet away when they saw the vehicle barreling into the crowd.

"We heard somebody scream, 'Look out!' (The driver) plowed through a police motorcycle, and then a crowd of people," Kapple said. "People were flying everywhere."

Konda Walker, from Anchorage, Alaska, was attending the festivities ahead of the homecoming game.

"At first we thought it was part of the show," Walker told the News Press. "People were flying 30 feet into the air like rag dolls."

Phone calls to Oklahoma State officials were not immediately returned.

The university posted on Twitter: "Oklahoma State University is saddened by the tragic parade incident earlier this morning. Our thoughts & prayers are with those affected."