The Federal Aviation Administration says a flight from Seattle to Chicago slid off the runway at O'Hare International Airport.

Chicago Fire Department officials tell WBBM-TV (http://cbsloc.al/1Tpsr4B ) that there were no injuries when the aircraft slid onto the grass.

The FAA says the slide-off happened at 7:55 a.m. Wednesday with United Flight 1977.

A fire department spokesman said the aircraft would be towed off the airfield.

The FAA says it's investigating.

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Information from: WBBM-AM, http://www.wbbm780.com