The Texas Railroad Commission is in Port Arthur to investigate an explosion that leveled a home and caused damage to buildings in a two block area.

  Investigators believe a leak in a natural gas line caused the explosion in the 23 hundred block of Green Avenue.

 The homeowners were away but two neighbors received injuries from flying glass.

  The Railroad Commission is trying to determine if natural gas was involved and if any pipeline safety rules were violated.

  It's also trying to learn if any recent construction might have been a factor.

  The investigation will take about 45 days.

  Watch Live at 5 and Nicole Murray's report Monday on KFDM News at 6 for the latest on the investigation.