A woman in her 30s has died from a gunshot wound in a suspected homicide in West Perth.

Police said a woman was found wounded in a block of units in Mayfair Street just after 2:00am today.

She was rushed to Royal Perth Hospital but died from her injuries.

A resident on the street, who did not wish to be named, said he heard noise in the car park about 2:00am.

"I opened my window to tell people to be quiet, and I noticed that there were a group of police gaining entry to a top left unit over the car park," he said.

"The noise I heard was more the police gaining access to the property, asking whoever was in there to come to the door with their hands in the air."

The neighbour said he saw three or four police officers outside the property.

"They had their tasers and [were] obviously in full flight."

The neighbour said he believed a young couple, who moved in about two and a half or three months ago, lived at the premises.

Two men, who were supposedly known to the victim, have been arrested and are being questioned by police.

Heavily armed members of the Tactical Response Group were at the scene for at least two hours before packing up and leaving.

Mayfair Street remains cordoned off between Outram and Colin streets, as police continue to investigate the shooting.

The Tactical Response Group was called to the scene after reports of shots fired. ( ABC News: Graeme Powell )

Police at the scene of the shooting on Mayfair Street. ( ABC News: Graeme Powell )