Four arrested over letter bombs sent to addresses in Northern Ireland and England
Four people have been arrested over a series of letter bombs sent to addresses in Northern Ireland and England.
Two men - aged 35 and 46 - and two women, a 21-year-old and 44-year-old, were arrested in Londonderry.
They are currently being question by police.
The arrests relate to a series of devices which were sent to addresses earlier this year, and in 2013.
They are being questioned by detectives investigating the sending of explosive devices to Armed Forces careers offices in Oxford, Brighton, Canterbury, Aldershot, Reading and Chatham and the Queensmere shopping centre in Slough in February.
In October last year dissident republicans were also blamed for sending a series of letter bombs to high profile political and security figures in Northern Ireland.
The investigation is being led by PSNI detectives from who have been working in close liaison with officers from the South East Counter Terrorism Unit in England.
Belfast Telegraph Digital