The remains of a fertilizer plant burn after an explosion at the plant in the town of West, near Waco
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Texas plant blast: Criminal probe opened three weeks on

11 May 2013 Last updated at 07:56 BST

Texas authorities have launched a criminal probe into a deadly explosion at a fertiliser plant in April.

The incident "severely impacted" the community in the town of West, a law enforcement official said.

The 17 April explosion at West Fertilizer Company killed 14 people, wounded 200, and caused a tremor as powerful as a small earthquake.

Mark Mardell reports from Washington.