Posted on August 20, 2014
Police investigating a series of letter bombs sent to addresses in Northern Ireland and England have arrested four people.
Two men, aged 35 and 46, and two women, aged 21 and 44, were arrested in Londonderry on Wednesday.
They are being questioned about the devices which were sent last year and earlier this year.
The investigation was led by detectives from the Police Service of Northern Ireland’s (PSNI) Serious Crime Branch.
They have been working in close liaison with officers from the South East Counter Terrorism Unit in England.