Firefighters from two cities and Clark County are fighting a three-alarm fire that forced the Speedway Casino/Ramada Inn at Interstate 15 and Cheyenne Avenue to evacuate its casino and hotel rooms.

North Las Vegas firefighters responded to a call of smoke at the hotel and casino about 3:30 p.m.

As smoke poured from the roof a second alarm was called, said Scott Allison, spokesman for the Clark County Fire Department. After the hotel and casino had been evacuated, reports came that workers might be on the roof.

Firefighters did not find any workers, but flames in the attic escalated the blaze to a three-alarm fire, Allison said.

No firefighters or guests have been injured, Allison said.