Post-mortems are to be carried out on two men found dead in a house in Glengormley on Friday.
The bodies of Gavin (38) and Mark Scott (24) were discovered at Hillview Park in Newtownabbey.
Gavin was Mark's uncle.
Last night neighbours said that the two men had only recently moved into the quiet cul-de-sac, off Ballyclare Road.
"They kept themselves to themselves," said one.
"I saw them coming and going from the house in their car, but I never got to know them."
"They didn't really speak to anybody," said another neighbour, who didn't wish to be named.
Newtownabbey mayor John Scott, who is no relation, last night offered his condolences to relatives of the men.
"It's very sad for the family. They're just in shock at what has happened," he said.
"Words can't describe just what way the family will be feeling."
The mayor said he knew the two men personally.
The family are owners of the Hill Tavern in Carnmoney, where Gavin occasionally worked, he added.
And he revealed that Mark's mother was on holiday in Spain when she received the tragic news.
South Antrim MLA Pam Cameron also expressed her sympathy to the family and friends of the two men.
"This is devastating news for the family and the surrounding area," said Cameron.
"I don't know the circumstances of the deaths but my heart goes out to those affected.
"The police have said it is not suspicious - but it is still an awful tragedy for everyone involved.
"If it should transpire that drugs are involved, then it is an issue we all need to address.
"This is yet another tragedy which leaves lives ripped apart. My thoughts are with the families and friends of the two young men who have died."
Antrim and Newtownabbey SDLP councillor Noreen McClelland also offered her sincere sympathies.
"This is a tragedy for the families involved," the councillor said.
"I am deeply saddened to hear the news of the deaths of these two young men.
"It really is heartbreaking and I can only imagine what their families are going through.
"They are in our thoughts and prayers at this very difficult time."
Mark's friends paid tribute to him via social media. Pal Jordan Doherty wrote on Facebook: "Can't believe what I am waking up hearing, I'm in complete shock.
"You were one of a kind. Can't believe I'm never gonna get to have another beer with you or anything, absolute gentleman, rest in peace brother love u."
Police are investigating the circumstances of how the two men died.
However, their deaths are not being treated as suspicious.
When the Belfast Telegraph called last night at the house where the bodies were found there was no sign of any police presence.