Four men have been arrested by police investigating the discovery of a viable explosive device in west Belfast last year.
The device was an explosively formed projectile or EFP, a weapon police said “is primarily designed to attack armoured vehicles and kill the occupants within”.
Its discovery in the Pantridge Road area on 30 October caused widespread disruption.
Police said: "While it was clearly designed to kill or seriously injure police officers serving the local community in west Belfast, it was left in a position where there was every possibility that it could have killed or maimed members of the public.
“Those responsible showed callous disregard for the safety of members of the public and police officers and we were extremely fortunate that no one was killed or seriously injured.”
Three men aged 21, 34 and 60 were detained in Belfast on Monday, while a 29-year-old man was arrested in Dungannon, Co Tyrone.
They were all arrested under the Terrorism Act and have been taken to Musgrave Serious Crime Suite where they are currently being questioned.
Police said their investigation into the incident is “progressing” and urged anyone with information to get in touch via the number 101.