Investigators are looking into the cause of a fire that caused significant damage to a diner on Indianapolis' east side early Thursday. The fire at the Four Seasons Diner, near Shadeland Avenue and East 21st Street, was reported around 6:15 a.m. Nov. 21. Four 911 calls reported fire on the building's roof near a sign on the building, and employees reported smoke after the sign was turned on, an Indianapolis Fire Department spokesperson said. MORE: https://www.wthr.com/article/news/local/fire-damages-four-seasons-diner-indianapolis-east-side-shadeland-avenue-21st-street/531-10b5e4e6-34c6-493c-8799-869b04e2d15b