Police defused a second explosive device in the city centre, which was seriously damaged by the blast.

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Many believe the city's explosive growth - Mumbai is expected to be home to 23 million people by 2015 - is driving it towards urban and social extremes.

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Mexico raised the alert level for the Popocatepetl volcano near Mexico City after observing increased explosive activity.

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As it turned out, authorities' decision to rely on every tool at their disposal was a wise one: Dykes had planted an explosive device in a ventilation pipe he'd told negotiators to use to communicate with him on his property in the rural Alabama community of Midland City, and also placed another explosive device inside the bunker, the FBI said in a statement late Tuesday.

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City's leisurely stroll in the first half was transformed into an explosive attacking performance in the second.

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