(Williamsburg, VA) -- A mysterious black ring has appeared in the skies above one Hampton Roads city. Rocio Rivera has more.Preview: Residents in Williamsburg first reported seeing the ring shortly after 11 a.m. Tuesday. WAVY reported getting several calls about the strange ring. And others reported the ring appeared and disappeared within 10 minutes. WAVY reports the ring could be caused by a fire or some other type of explosion. But the James County Fire Chief said no fires had been reported in Williamsburg around the time the ring appeared. Meteorologists say the ring could be a by-product from pyrotechnics or a smoke ring from a plume of smoke from an industrial process or explosion. I'm RR.