Chilling details emerge after decomposing bodies of two sisters are found in flat with no signs of injury

CHILLING new details have emerged about two sisters found dead in a Sydney flat with no signs of injury.

The decomposing remains of the two women, aged 23 and 24, were found in an apartment block in Canterbury, Australia, in the early hours of June 7 after cops burst in to conduct a welfare check.

The building manager became concerned after mail began to pile up outside their first-floor apartment and they failed to pay rent for four weeks.

When cops arrived, they discovered a gruesome scene with the two sisters in a “somewhat decomposed” state.

Police said there were no signs of forced entry and no signs of injury.

Detectives confirmed both women were found in separate bedrooms and had been there for "some time".

And according , there had been two prior welfare checks, one done by police, on the women in the months leading up to the discovery of their bodies.

During one check, the women were described as "timid" and refused to let anyone enter the flat.

The sisters, who were foreign nationals believed to be from the Middle East, eventually allowed the check to happen - but reportedly spend it cuddled in the far corner of the unit.

A source said: "They were standoffish and didn't really want to talk.

"Something felt off, but they said they were ok. What more could anyone do?"

The first welfare check was reportedly conducted in March, with officers leaving after the women insisted they were fine.

The source said the pair spoke English "relatively well" - but they were withdrawn and kept to themselves.

Two months after the welfare checks, their rent stopped being paid and their mail started piling up at the door.

Residents previously described the building as typically quiet, with the grisly discovery rocking the local community.

Neighbour Alan Ho told the Daily Telegraph: "It's usually a pretty tame area so it's pretty concerning to hear about something like this."

Another neighbour said: "It's sort of scary to know this is what's happening in your own neighbourhood, we hear sirens go up and down all the time... and then to be so close to home, it's quite scary."

Cops are treating the deaths of the sisters as "suspicious" and murder detectives have joined the investigation as they piece together the bizarre case.

Neither victim has yet to be formally identified.

Anyone who has information is urged to contact Burwood Police Station or Crime Stoppers.