Fire caused major damage to the Love's Trave;l Stop near Interstate 94 in Gary, Indiana Thursday.
The blaze is said to have started at about 10:40 a.m. It took firefights more than six hours to extinguish the blaze.
Onlookers and authorities said the fire appears to have started in the Denny's Restaurant at the travel center. The blaze did not reach the fule takes or fuel islands.
A Love's spokesperson Thursday said all customers and employees escaped the blaze. There were no reports of injuries.
The cause of the fire remains unknown.