The munition was found at the Rivenwood housing development on Movilla Road in Newtownards, County Down, the Police Service of Northern Ireland (PSNI) said.

The affected part of the site is currently unoccupied so no homes were evacuated, a police spokesperson said.

District Commander Superintendent Johnston McDowell said: “This afternoon at approximately 15.38pm the render safe procedure of the operation was initiated and Ammunition Technical Officers (ATO) carried out a controlled explosion of a bomb, which had been discovered in the Rivenwood area of Newtownards last Thursday, 15th August.

“The munition found, which I can now confirm was identified as being an air-dropped SC-500 German bomb from World War Two, was understood to have been in and around 83 years old, but still posed a significant risk to public safety, even after all this time.

“This was a highly complex operation that prompted the evacuation of a large number of homes within 400 metres of where the bomb was located, and local police officers worked around the clock to engage with those impacted.

“The disposal team was comprised of members of the Army’s 321 EOD & Search squadron, who alongside the police service led the major operation. They were also assisted by other emergency services and partners, who all provided expert knowledge in managing the high-risk emergency situation.

“I would like to express my sincere thanks to all our personnel involved, who worked day and night this week to keep the public safe. The success of this operation is testament to the level of skill our military colleagues have.

“Whilst we will endeavour to enable residents to return to normality as soon as possible, please be advised an update will be provided in due course as to when they are safe and able to do so.

“The operation continues until we reach the completion phase. Thank you again for your continued cooperation at this time.”