Police have issued a fresh appeal in the hunt for the killers of murdered prison officer David Black, on the anniversary of his death.
The Police Service of Northern Ireland (PSNI) said today that men were seen running from the dark blue Toyota Camry used to shoot the 52-year-old dead in in Co Armagh, Northern Ireland, as he drove to work at Maghaberry jail.
PSNI Detective Chief Inspector Richard Harkness said: "A number of men were seen running away from the Toyota Camry car."
He added: "I would also appeal to people in Cookstown to think about what they saw in the days and weeks before David's murder last year. Did you see any unusual activity around David's home or the places he frequented?
"I would remind people there is a reward of up to £10,000 available for information leading to the arrest and conviction of those responsible."
Democratic Unionist Party MLA for North Belfast William Humphrey described the pipe bomb attack as an attempt to kill.
This nail bomb was not only a deliberate attempt to further inflame tensions in this area but was an attempt to cause death or serious injury. Fortunately despite this indiscriminate weapon exploding, no injuries were sustained.
Local people have already suffered enough as a result of the trouble within the area. There is absolutely no justification for violence from any quarter, and I would hope that this incident will be treated with the utmost seriousness.
– Democratic Unionist Party MLA for North Belfast William Humphrey
Theresa Villiers, Secretary of State for Northern Ireland, also condemned the "deplorable attack" on police officers.
An improvised explosive device was hurled from the nationalist Brompton Park area of Ardoyne and exploded after striking an armoured police vehicle just after 5pm.
There were no reports of any injuries.
Witness Sam Coulter, who was yards from the explosion at a loyalist protest, said it was fortunate no one was hurt.
We were standing having a peaceful protest when all of a sudden there was a bang and the next thing we heard the 'tinkle, tinkle, tinkle' of nails dropping on the ground.
I think it was directed at the protest - police were at the other side of the road behind a Land Rover. Luckily nobody was hurt - just a bit of a bang to the ears.The place is in lockdown now with police doing sweeps of the area to gather evidence.
This won't put us off our protest - we are still here.
Four improvised 'blast bombs' and a pipe bomb packed with nails have been thrown towards police lines in north Belfast.
Police are currently dealing with public disorder in the Lower Newtownards Road area of east Belfast this evening.
At least four blast bombs and several petrol bombs have been thrown at police. There are no reports of any injuries at this stage. Water cannon has been deployed and one AEP (attenuated energy projectile) round has been fired by police.
Police would appeal for calm in the area and would call on those with influence to do what they can to help restore calm."