PHOTO: Firefighters are battling a massive blaze in downtown Miami, Arizona Thursday morning. Miami Police Chief Keith Thompson said they received their first 911 call of a fire just after 2 a.m. in downtown Miami near Keystone Avenue and Sullivan Street. Five fire departments are still fighting the fire which is taking up half a city block. They are working to keep the fire contained at this time. He said so far six buildings have been involved in the fire and added that most of the buildings are roughly 100 years old. Thompson said one injury has been reported by a firefighter, but it is believed to be minor. The cause of the fire is still under investigation.