(CNN) -- As many as 30 passengers were injured -- one seriously -- after a United Airlines flight experienced severe turbulence and landed in Denver, Colorado, Tuesday evening, the Denver Fire Department said.
UAL Flight 967 was en route from Washington Dulles International Airport to Los Angeles International when it encountered the turbulence over the Midwest, the Federal Aviation Administration said.
The Boeing 777 was diverted to Denver and landed about 7:30 p.m. (9:30 p.m. ET).
The Denver Fire Department said up to 30 people were hurt. The extent of the other injuries was unknown late Tuesday.
United, which would not confirm the number of injuries, said the plane had 255 passengers and a 10-member crew. The airline will conduct an investigation, spokeswoman Megan McCarthy said.
Inspectors were en route to the airport, the FAA told CNN.