A letter bomb has been sent to the Public Prosecution Service office in Derry.
The building on the city’s Limavady Road was evacuated at about 1230pm today.
Police said the bomb was similar in make-up to two devices found in postal sorting offices in County Antrim on Friday.
One was addressed to the chief constable, the other to Derry police commander, Chief Inspector Jon Burrows.
Dissident republicans were blamed for sending the bombs.
DUP Deputy Mayor Gary Middleton said he doesnt know what those responsible are trying to achieve:
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