A brother and sister have been confirmed as the two victims of a suspected double homicide in the inner-city Perth suburb of Victoria Park.

Key points: A man and woman were found dead in an apartment on Sunday afternoon

A man and woman were found dead in an apartment on Sunday afternoon Neighbours reported hearing screams and yelling coming from the building

Neighbours reported hearing screams and yelling coming from the building A man who lived in the same building has been arrested

The man and woman were found dead inside a Leonard Street apartment on Sunday afternoon.

A man — a neighbour living in the same apartment block — was taken into custody about 9:00am on Monday and has been assisting police with their inquiries.

Police believe there is no further risk to the community.

Commander Allan Adams from the State Crime Division said they were given information which identified the neighbour as a suspect.

Commander Allan Adams called for anyone with information to contact police. ( ABC News: James Carmody )

"One of the victims was living at the apartment, I can tell you the suspect also resided within that complex of units," Commander Adams said.

"Obviously, the investigations into connection between the victim and the suspect continue.

"Police are obviously conducting a thorough investigation going down a number of avenues and the forensic investigation of key material is a pivotal part of that investigation.

"There was a significant endeavour at the crime scene to try and understand what had occurred, some information came to hand this morning that resulted in the identification and apprehension of the suspect."

Screaming and yelling heard by neighbours



A large contingent of detectives was present at the apartment block on Monday morning.

Neighbours reported hearing screaming and yelling coming from the building, on the corner of Leonard and Washington streets, about 4:00pm on Sunday.

A crime scene was established on the top floor of the eight-storey building.

Police have established a crime scene on the top floor of the apartment block where the man and woman were found dead. ( ABC News: James Carmody )

Investigators in plastic suits and masks removed evidence from an apartment throughout the day.

It is understood the second body was not discovered until some time after the first.

A small red SUV was towed away from the scene on Monday morning.

A second car, a dark coloured sedan, was also later towed from the property under police supervision.

A second car was towed away from the apartment in Victoria Park, where two people were found dead. ( ABC News: James Carmody )

Neighbour shocked

Neighbour Colin Adams was sitting outside his nearby home when he heard yelling, screaming and shouting which sounded like people arguing.

Mr Adams said the commotion lasted about 10 minutes.

Neighbours heard screaming from the apartment block where the pair were found dead on Sunday. ( ABC News: James Carmody )

"Then we saw the police arrive, about 15 police cars and two ambulances, and then we saw the paramedics go upstairs and then come back downstairs and we figured it was something serious," he said.

"I'm very shocked and sad, it's just a numb feeling really, especially when something like this happens in your own street."

Mr Adams said it came as even more of a surprise given most people were having a quiet long weekend due to coronavirus restrictions.

"You don't expect to things like this to happen when we're in a situation like we are at the moment, it's supposed to be a quiet time," he said.

Colin Adams said he heard a commotion coming from the apartment block which sounded like people arguing. ( ABC News: James Carmody )

Police Commissioner Chris Dawson urged anyone with information about the deaths, or who saw or heard anything unusual in the area over the broader Easter break, to contact police.

"It doesn't matter how small you think it might be, whether it's persons, vehicles, whatever it might be, noises, we'd just like you to make contact with us," the Commissioner said.