- 2 updates
Police have released photographs of two vehicles they believe may have been used in an attack on prison officer Adrian Ismay.
The father of three died after being injured by a dissident republican bomb which detonated under the van he was driving to work on March 4 in east Belfast.
Police are appealing for information on a red Citroen C3 with the number plate SKZ6662, which is believed to have been used by those planting the device.
They also want information on a silver Skoda Fabia KFZ2352, which is thought to have been used before and after the incident by those involved.
Detective Chief Inspector Richard Campbell said: "In particular I am appealing for any sightings of this vehicle, on the move or parked up, between 7pm on the evening of Thursday 3 March and 4am during the early hours of Friday 4 March.
"It is my understanding that a male was dropped off in this vehicle in Pilot Street in the Docks area of Belfast at around 3am on Friday morning and I am appealing for anyone who saw this, or who knows the identity of this male to come forward to police."
A 52-year-old prison officer who was injured by a targeted booby-trap bomb blast in Northern Ireland earlier this month has died.
Married father-of-three Adrian Ismay was hurt after a dissident republican bomb detonated under the van he was driving to work on March 4 in east Belfast.
The prison officer was given surgery for severe leg injuries suffered in the attack and was thought to be recovering but died on Tuesday.
Police Service of Northern Ireland said it was "working to establish the exact cause of Adrian's death" while continuing to investigate the bombing, which a group calling themselves the New IRA has claimed to have carried out.
One man has so far been charged with attempted murder and causing an explosion with intent to endanger life.
Northern Ireland First Minister Arlene Foster tweeted her shock as reports of his death emerged:
Prime Minister David Cameron and Northern Ireland Secretary Theresa Villiers also paid tribute.
Chairman of the Prison Officers' Association Finlay Spratt said the death was a complete shock.
Mr Spratt said: "I have no doubt that the explosion that took place was a factor. He was not a person that I knew had any sickness or ailments.
"I just can't believe it. I was just ringing to find out how he was and that's the news I got."
Mr Spratt added: "He was out of hospital and for this to happen - it is as much of a shock as the attack itself."
The long-serving officer worked at Hydebank Wood Young Offenders Centre in south Belfast and had trained new recruits to the NI Prison Service.
The New IRA group told the BBC that Mr Ismay was targeted because he had trained guards at HMP Maghaberry.