Experts say terrorist groups are seeking materials for a crude nuclear device - a so-called "dirty bomb" - that would have limited blast potential but could spread radiation in a major urban area.

VOA: standard.2010.04.11

New York (CNN) -- This could have caused a major blast from the past.

CNN: STORY HIGHLIGHTS

The blast is the first major attack in India since a September 2011 bombing outside Delhi's High Court killed 13 people.

BBC: India Home Minister Shinde visits Hyderabad blast site

The citations, including one for a violation OSHA said may have led to another major accident, come from its post-blast monitoring of the plant.

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