The fire service extinguished the blaze, which had been started deliberately when accelerant had been poured over the door and through the letterbox.

Mr Warnock died when he was shot a number of times in his car in Newtownards.

The five-person team swam the challenging conditions in seven hours and 30 minutes, accompanied by pods of dolphins.

Police confirmed the device was an 83-year-old air dropped German bomb

The bomb was discovered in the Rivenwood area of Newtownards on Thursday morning.

The PSNI said the work in Newtownards, Co Down, could take a number of days.

Officers remained at the scene on Saturday evening.

The mosque at Greenwell Street in Newtownards was attacked on the early hours of Saturday.

They said the incidents were ‘wrong, unacceptable and rejected’ by the vast majority of the community.

Derry City & Strabane Superintendent William Calderwood said one person has been arrested.

It was alleged a number of men, armed with weapons, launched an attack at a house in Newtownards.

The incident occurred in Newtownards, Co Down, on Thursday evening.