A rudimentary explosive went off near
a central Rome post office on Friday. No one was injured but
some cars in the Aventino area were damaged.
Witnesses said they hear two blasts, one of which was bigger
than the other.
Prosecutors have opened an investigation and the hypothesis
that anarchist extremists could have planted the explosive is
considered a possibility, sources said.
Anarchist groups were behind several similar past incidents
in Italy.
Initial police analysis of the explosive suggest that the
people who planted it wanted to carry out a "demonstrative
gesture" and not do harm, sources said.
Investigators are studying video footage of the car park
where the explosion took place to try to identify the people
responsible.
The explosive was equipped with a timer, sources said.
Initial analysis suggests a single explosive generated two
blasts, the sources said.
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