Those are the words of a 26-year-old Perth man accused of taking five people hostage during a two-hour siege on Tuesday night before being shot by police.

The accused gunman, Daniel Ashley, was in a critical condition at Sir Charles Gairdner Hospital on Wednesday night.

Earlier, police say he posted chilling messages on his Facebook page.

The first message was posted at 10.13pm, according to The West Australian. It read “Tonight I am going die (sic)”. A second message, exactly a minute later, read “I will be shot police (sic)”.

It’s believed Ashley was going to the house in one of Perth’s most affluent suburbs to confront a woman over a relationship that had recently ended.

Police identified Daniel Ashley, 26, as the man who took five people hostage in a Mosman Park home. Picture: Facebook Source: Facebook

At a midmorning press conference, police revealed the man was armed with a replica pistol and was shot twice — once in the upper body and in the face.

It was also confirmed that at least one hostage knew the attacker.

Heavily armed police officers, including the Tactical Response Group unit, surrounded the property on Samson Street in Mosman Park after residents heard screams and raised the alarm just after 9pm on Tuesday.

Negotiators tried to calm the man down on the phone, but the situation deteriorated after a tense two-hour siege.

A spokesman for Sir Charles Gairdner Hospital said the gunman was in a critical condition in the intensive care unit after overnight surgery.

Tactical Response Group officers fired at the man about 11pm.

Five people were inside the house, their arms and legs tied with cable ties and duct tape was over their mouths.

At a media conference, WA Police Assistant Commissioner for State Crime Michelle Fyfe said:

“About 9.14pm last night we received a 000 call from a male person stating that there was a male intruder at the house in Mosman Park.”

Forensic officers in Samson Street, Mosman Park, after a gunman was shot by police ending a siege. “At Picture: Matthew Poon Source: News Corp Australia

“He also stated that person had a gun.

“Further calls were received from the occupants of that house and the circumstances were confirmed.”

Assistant Commissioner Fyfe said initially it was thought three people were in the house, but it was later confirmed five people were being held hostage.

“About 11.10pm there was movement observed in the premises and the offender was seen to be holding what appeared to be a handgun in his right hand,” she said.

“He came out of the front door, he was challenged by two Tactical Response Group officers, he was asked to put his gun down on a number of occasions and he failed to do so.

“He was shot twice and he was incapacitated.”

The man is now receiving treatment to gunshot wounds to the upper body and face.

Police have not yet been able to question the alleged gunman.

Ms Fyfe said it had been a “traumatic” event for the hostages and police involved, and their welfare is being taken care of.

She said ballistics experts have since determined the handgun was a HK USP compact replica — “a very, very real looking handgun”.

“A range of very serious offences is being considered at this time and they include deprivation of liberty, assault, and going armed to cause fear,” Ms Fyfe said.

“The fact that the weapon was a replica, does not limit us in any way regarding these charges.

A gunman has been shot by police ending a Mosman Park siege, where up to five people were held hostage. Picture: Twitter/Channel Nine Source: Supplied

Ms Fyfe said one of the hostages knew the attacker.

“This is not a random attack and the community needs to be assured by this,” she said.

“That said, he was prepared when he went to the house for what was going to unfold.”

She said initial investigations suggest the TRG officers were justified in firing their weapons.

Ms Fyfe also thanked neighbours for their cooperation on Tuesday night and Wednesday morning.

Earlier on Wednesday, a neighbour directly next door to the property where hostages were held said he heard screaming as the drama started.

“I thought it was a bit odd so I locked the doors, made a cup of tea, spoke to my partner on the phone then heard a lot of commotion out the front, mostly dogs barking and I went and investigated and was shouted at to get back into the house by police,” he said.

Officers then asked to come in to the man’s property and look at the house where the hostages were being held.

After taking the officers to his upstairs bathroom, the man told police the house plans were on a real estate website because the property was for sale.

“I tried to get my son to sleep and tried to sleep myself and woke up just before 11pm I think with more shouting ‘Put the gun down, put the gun down’ and then two shots.

“Then I looked out the window and saw people I normally see day to day get removed from the house with duct tape over their mouths.

“There’s normally a young chap and a couple in there. The guy that owns it lives in Melbourne.”

The neighbour said he worried for the safety of his children and helped the police as much as he could.

Dramatic night: Samson Street residents return to their homes after being evacuated during the siege. Picture: Matthew Poon Source: News Corp Australia

Another Samson Street resident, Peter, told ABC it was an “intense” night.

“It was pretty intense, we saw a bunch of commotion out on the street corner about 9.30pm and things started heating up probably half an hour after that,” he said.

“About half a dozen police cars were blocking the street and a bunch of other police turning up and putting on their jackets and what looked like (bulletproof) vests, so we knew it was something more than just a burglary in the street.

“Probably about 10 minutes after that what we saw from the window, they made a fairly strong assault from the street on the house in question and heard ‘Put your gun down, put your gun down’ and then 30-40 seconds later was a couple of shots fired and then an ambulance rocked up, parked on our front lawn pretty much and saw what we now know were hostages get escorted out of the house.”

Peter said after the shots were fired, residents were evacuated from their homes.

Inspector Rob Harrison talks to the media about last night's siege. Picture: Matthew Poon Source: News Corp Australia

Major Crime Squad have taken over the investigation, interviewing the five hostages.

The Internal Affairs Unit will also investigate the police actions that led to the shooting.

An area surrounding the Samson Street home has been taped off as forensic and ballistic experts examine the scene.

A neighbour told Nine News Perth she was shocked it could happen in her neighbourhood.

“My teenage son, who sleeps at the front of the house, he heard a lot,” she said.

“He heard someone was shouting ‘Put your gun down’ and then two shots were fired.”

One witness told Seven News she “just heard a lot of noise and yelling.”

“Next thing we heard was some shots and that was the point where I decided it would be a good idea to just make sure that I stayed inside,” another neighbour told the Seven Network.

Another witness said she saw a Tactical Response Group police officer dressed in black fire two shots.

“I saw a man in black, a police officer, fire a shot and within a heartbeat, then a second shot,’’ she said.

The siege lasted about two hours.

Residents heard police yelling at a man about 11pm to drop his weapon. Shots rang out shortly afterwards.

“I heard them yelling ‘drop the gun, drop the gun sir’ and say ‘that’s a gun in your hand sir’, sort of as if the man who had the gun didn’t realise he was holding one,” one neighbour told the Seven Network.

“I just stayed in my bed.”

Media reports say police managed to make mobile phone contact with one of the hostages, before the drama ended in gunshots. None of the hostages were hurt, but they have been treated for shock.