(Clark County, NV)  --  A small explosion and fire was reported at the Hoover Dam in Nevada.  According to multiple sources, this happened at the Arizona turbine house Tuesday morning. Video shows black smoke pouring out from the bottom of the dam as a fire burns. The blaze was caused when a transformer caught fire. There are no reports of any injuries. Boulder City, Nevada Fire Department reports the fire is out. Tours at the dam were paused for about 30 minutes. All questions are now being referred to the Bureau of Land Management.