India, April 18 -- A massive fire has erupted at the Minnesota Renaissance Festival grounds in Scott County. Photos circulating online show flames engulfing large sections of the grounds as firefighters work to bring the blaze under control. No injuries have been reported at this time. The extent of the damage remains unclear.

Some witnesses reported that the blaze may have been sparked by a lightning strike.

"The MN Renaissance Festival was hit by lightning and there's a three alarm fire going on there now," one person wrote on Facebook.

Another reported, "There is a fire at the festival grounds. Someone said started by lightening strike."

A third person wrote, "Fires at MN Renaissance Festival, Area 600 was Hit by Lightning by the I...