Texas fertilizer plant blast cause still undetermined

April 24, 2013 2:24:51 PM PDT
One week ago, an explosion decimated a fertilizer plant in the town of West, Texas, killing 14 people and injuring more than 200.

The blast left a nearly 100-foot wide and ten-foot deep crater where the plant once stood.

Damage estimates for the explosion are expected to top $100 million.

Investigators are sifting through the rubble to determine how a fire started in a facility that was shut down, and whether that fire sparked the massive explosion.