William Patrick Swanton said, it has not been ruled out yet.

CNN: 12 bodies recovered, 60 unaccounted for after Texas blast

William Patrick Swanton said early Thursday morning that the death toll is only an estimate as search and rescue operations remain under way in the town of West.

WSJ: Fertilizer-Plant Blast Kills Five to 15 in Texas

William Patrick Swanton told reporters.

CNN: Texan town tries to rebuild with community, spirituality