Published Monday, 07 October 2013
A Foyle Search and Rescue volunteer found a pipe bomb in a rucksack on the river embankment to the rear of the council premises just before 11pm on Thursday 20 September 2012.
Shortly afterwards, police called to the scene discovered a secondary device attached to a bicycle chained to a railing just a short distance away.
On Monday PSNI issued images of the suspected bomber, along with photos of the rucksack and a similar bicycle.
The rucksack is a black Compass model with a blue and red design and the bike is a blue-framed Freerider model.
The footage shows the suspected bomber wheeling the bicycle along the Foyle river walkway and a short time later retracing his steps, having planted the rucksack and the bike.
Chief Inspector Jon Burrows said: "Either device had the potential to kill or injure anyone in the vicinity, had they exploded.
"The second device on the bike was timed to go off when the security forces were in the area dealing with the first device in the rucksack.
"The bike bomb was on a walkway that is frequently used by walkers and joggers and people on their way home from a night out. We were lucky that no one was killed or seriously injured.
"I would appeal to anyone who recognises this individual to contact police on 0845 600 8000 ext 64911. Alternatively, anyone who does not want to provide their details can phone the independent charity Crimestoppers on 0800 555 111."
Police have also appealed to anyone who recognises the rucksack or bicycle to come forward.
© UTV News