DENVER -- A fire official says a United Airlines jetliner was diverted to Denver after experiencing "significant turbulence," injuring about 30 people onboard, one seriously.

The flight originated in Washington, D.C., and was headed to Los Angeles.

Denver Fire Department spokesman Eric Tade says the plane landed safely Tuesday evening at Denver International Airport, where medical crews met the flight.

Denver Health spokeswoman Dee Martinez says 21 patients are being transported to five area hospitals. She released no details on their injuries.

But Tade says one person was seriously hurt, while the other injuries included bruises, whiplash, strains and sprains.

United Airlines spokeswoman Megan McCarthy says Flight 967 was carrying 255 passengers and 10 crew members. She says United is working to find flights for the uninjured passengers.