Police believe dissident republicans are behind Monday's death threat, and are linking it with a similar package sent to the home of Marian Quinn, a member of the District Policing Partnership in Derry.

Last month, a hoax device was placed under her daughter's car, however, Mrs Quinn says she is determined to stand up for what she believes in.

"For over 30 years my community cried out for decent, accountable policing. This is the first chance we have had to deliver that.

"The people who carry out acts like this aren't interested in law and order.

People who serve on the district policing partnerships and indeed join the PSNI are the people of real courage Superintendent Johnny McCarroll

"They want lawlessness so they can continue making too much money through illegal activities," she said.

SDLP leader Mark Durkan has condemned the threat against Mr Bradley as a "despicable attack" against a citizen acting for the public good.

PSNI Superintendent Johnny McCarroll said he was "disgusted" by the threat against Mrs Quinn.

"Local people who serve on the district policing partnerships and indeed join the PSNI are the people of real courage in this community," he said.

District Policing Partnerships were set up across Northern Ireland under reforms initiated by a commission headed by former Hong Kong Governor Chris Patten and implemented by the government.

Councillors and members of the local community sit on the boards and work alongside the Police Service of Northern Ireland's 29 District Command Units in trying to meet local community policing needs.

The Northern Ireland Policing Board handles some of the most sensitive issues facing policing and holds PSNI Chief Constable Hugh Orde and his senior officers to account.

Former Assembly members and independent nominees serve on the board whose headquarters are in Belfast.