Residents of more than 400 homes who had been evacuated in the Rivenwood area of Newtownards since the device was discovered last Thursday because of a large Second World War-era bomb have been able to return home.<br />Police and Army bomb experts had been at the site where a sand-filled structure was constructed around the device while it was considered if it should be removed or made safe there. <br />District Commander for Ards and North Down Superintendent Johnston McDowell confirmed a controlled explosion had taken place at 3.38pm. <br />Video: PSNI