Video surfaced Wednesday of an explosion that rocked a restaurant in Kansas City this week. It shows the building suddenly splintering as a fireball three stories high belches out from inside, shattering windows a block away.

The Tuesday blast at JJ's Restaurant reportedly killed one person and injured 15. Remains found inside the restaurant have not yet been identified.

Missouri Gas Energy said in an advisory that a contractor working nearby hit a natural gas line and was not able to seal it. It's not clear what ignited the gas that built up inside the restaurant.

Authorities were notified about the gas leak around 5:15 p.m., ABC News noted, and the explosion happened roughly 30 minutes later. Footage of the blast was caught by a nearby security camera.

“We remain focused on supporting the ongoing investigation into the cause of [Tuesday's] incident and on ensuring the continued security of the site,” the company added. “Our heartfelt thoughts and prayers are with all those impacted and their loved ones, and we want to thank the emergency responders for their efforts... and their continued work today to help so many.”

This video is from CBS News, aired Wednesday, Feb. 20, 2013.