Six injured in northwest Indianapolis apartment explosion

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Investigators are looking into the cause of an apartment complex explosion that injured six people Thursday night.

The explosion happened at the Pangea apartment complex in the 2600 block of Cold Spring Road around 10 p.m. Thursday. Five units had significant damage, and 12 residents were displaced.

Four of the six people injured were Marian University students. Two have been released and another two remain at Eskenazi Hospital with critical but non-life-threatening injuries. One of those in the hospital is a student from Indiana and another is a competitive cyclist from Georgia.

Apartment management has secured the building and have active security on site. They're working with engineers to determine the stability of the building.

Fire and police investigators can't go inside the building until engineers say it's safe for them to enter. Utilities remain shut off.

Those living in the apartments spoke with Eyewitness News. 

"I heard, like, the whole building shook, so we didn't know what happened. I thought a car had ran into the building," said Tyrone Johnson.

"There was a huge fireball, like the brightest fireball you've ever seen," said Teresa Clay. "We made sure everybody was out of the building, but it was just chaos."

Clay says she saw children running from the explosion, bloody and burned.

Two residents, ages 19 and 20, told investigators they were upstairs in their townhome when the explosion happened, but they did not know what caused it. They were taken to Eskenazi Health to be treated for what firefighters described as non-life-threatening injuries caused by slight burns.

Two friends, ages 20 and 22, were downstairs, but did not suffer any injuries. They were taken to IU Health Methodist Hospital as a precaution.

A mother, 48, and her 17-year-old daughter in an adjacent townhome were taken to the hospital, but did not suffer any injuries. Their residence was also damaged in the explosion.

Residents were evacuated from the building where the explosion occurred and nearby buildings. Emergency crews wanted to make sure utilities were shut off in the complex. The residents were boarded onto IndyGo buses to keep warm.

Tenants say they had complained about utility and gas issues in the past in the complex and some reported smelling the odor of "dirty water" or sewer gas in recent days.

It has not yet been determined what might have sparked the explosion. Citizens Gas tested the area outside the townhome, but did not detect any gas. Fire and police investigators continue to work with utility companies and the apartment management to try to determine a cause.

Fire investigators say they the building is too unstable for them to investigate further.

All occupants of the affected townhome and their pets were accounted for.