OKLAHOMA CITY - An entire southwest Oklahoma City neighborhood is dealing with the aftermath of a huge house explosion from Thursday afternoon.

A gas leak is being blamed, but there are big questions about just how the blast happened.

It appears this happened when a private contractor digging lines for AT&T cut through a 2-inch gas line.

Neighbors say they smelled natural gas well before the explosion.

ONG is investigating the incident as is the Oklahoma Corporation Commission's pipeline safety department. No word on when that investigation will be complete.