FOUR people were arrested in Derry on Sunday, and another today, in connection with Saturday's bomb blast in the town centre which destroyed a car parked in front of the local courthouse.
No injuries occurred from the explosion which was believed to have been the result of a car bomb, with police tipped off via a call from a charity hotline in England.
"Fortunately the bombing didn't kill anybody but clearly it was a very significant attempt to kill people here in this community," police spokesman Mark Hamilton said.
It is believed that the attack may have been co-ordinated by the Real IRA, a small dissident republican group based in the north of Ireland.
"These people [the Real IRA] have no support. These are minuscule, fringe elements that bring nothing positive to the table.