CLEVELAND (Reuters) - A United Airlines plane slid off the pavement at Cleveland's main airport early on Friday shortly after landing, forcing passengers and crew to exit by stairs, but no injuries were reported, airport and airline officials said.

United flight 1639 from Fort Lauderdale was turning onto the taxiway after landing at Cleveland Hopkins International Airport when it slipped off the paved area into the grass and snow, the airline said.

The airplane was carrying 103 passengers and five crew members and no injuries were reported, United said.

Airport spokeswoman Jacqueline Mayo said passengers from the Boeing 737 had been taken to the airport terminal by bus, and pavement conditions were good when the incident happened at 10:45 a.m. local time (1545 GMT).

"Crews were out all evening and morning," Mayo said. "We don't know why it happened, but it is safe for planes to land and taxi for takeoff."

(Reporting by Kim Palmer in Cleveland, David Bailey in Minneapolis and Ian Simpson in Washington; editing by Cynthia Johnston, G Crosse)