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INDIANAPOLIS (Aug. 13, 2014) - Heavy smoke filled Meridian Street in downtown Indianapolis Wednesday afternoon following a series of small transformer explosions underground.

Witnesses reported hearing sounds of explosions, and smoke could be seen rising from the ground in the area of 26 S. Meridian St. around 1:30 p.m.

Officers quickly evacuated the area of Meridian Street, between Washington and Maryland.

Crews from Indianapolis Power and Light are investigating the cause of what they said is a failed underground network protector incident.

Brandi Davis-Handy, IPL spokesperson, said in order to isolate the problem, a partial power outage will occur on the south side of Circle Centre Mall.

Mayor Greg Ballard and Director of Public Safety Troy Riggs were on the scene and briefed by both fire crews and IPL about the incident.

IFD said there were no injuries nor any damage to buildings.

Below are updates from FOX59's Liz Gelardi and the Indianapolis Fire Department as the news unfolded:

I was downtown getting video for another story when witnesses ran up to me saying there had been an explosion. pic.twitter.com/zG7iBk8xzu — Liz Gelardi (@LizGelardi) August 13, 2014

Just heard a loud noise again, now dark smoke is rising from a grate. pic.twitter.com/HDAtq6QlGx — Liz Gelardi (@LizGelardi) August 13, 2014

More loud noises & more smoke. Everyone is being asked to evacuate the area. pic.twitter.com/E4boU78LTB — Liz Gelardi (@LizGelardi) August 13, 2014

Underground transformer explosion causes heavy smoke & noise at Meridian & Maryland. #Evacuation @IPLPower pic.twitter.com/MqEW07QkGt — IFD NEWS (@IFD_NEWS) August 13, 2014

Fire officials confirm a large underground transformer exploded. Not sure what caused it. pic.twitter.com/VTNMDZ8bKA — Liz Gelardi (@LizGelardi) August 13, 2014

@IPLPower on scene w/ #IFD No injuries. Please stay out until crews have a chance to mitigate. Power to vault cut. pic.twitter.com/ZNSFyZlhES — IFD NEWS (@IFD_NEWS) August 13, 2014

https://twitter.com/Beauty4myAshes/status/499618216780759040

Gallery:

Photo from the Indianapolis Fire Department

Photo from the Indianapolis Fire Department

Photo from Liz Gelardi

Photo from Liz Gelardi

Photo from Liz Gelardi

Smoke visible from FOX59's downtown tower cam

Photo courtesy of IFD

Photo courtesy of IFD

Photo courtesy of IFD