MEMPHIS, Tenn. -- A large business fire is causing traffic delays early Friday morning in the Highland Heights area, according to reports. Summer Avenue is currently blocked in both directions between Highland Street and Sevier Street due to a structure fire. 📡 See more breaking news, local news and weather from WREG.com for Memphis and the Mid-South. 📧 Sign up for WREG newsletters and have the latest top stories sent right to your inbox. At this time, it is unclear what caused the fire or if anyone was injured. WREG is working to gather more details. We will update this story as they become available.