eglinton june psni northern ireland man
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The improvised explosive was planted in Eglinton on 18 June 2015.
Detectives investigating the attack have detained a 30-year-old man.
PSNI Detective Chief Inspector John Caldwell said: "The man has been taken to Musgrave PSNI where he is assisting police with their inquiries."
The device was found under the officer's car outside his home near Derry City Airport.
Police are on high alert in Northern Ireland for attacks launched by dissident republicans opposed to the peace process.