Prior to event An anonymous call was made to Australia's anti-terrorism hotline 48 hours before the siege, raising concerns about the content of Monis' website. On his website, Monis had pledged allegiance to "the caliph of the Muslims", believed to be referring to Islamic State leader
Abu Bakr al-Baghdadi, and denounced moderate Islam. It has been reported that the
Australian Security Intelligence Organisation followed up on the call by reviewing the website and Monis' posts on social media but found nothing to indicate that he was likely to commit an act of violence.
Hostage-taking and negotiations Monis entered the
Lindt Chocolate Café at 53 Martin Place, Sydney, at 8:33am Sydney local time on 15 December 2014 (
AEDT,
UTC+11). The café was located directly across from the
Seven News television studios, and near the
Reserve Bank of Australia, the headquarters of the
Commonwealth Bank,
Westpac, and
Martin Place underground train station. The hostage situation began at 9:44am, when Monis forced Tori Johnson, the manager of the café, to phone
000. Monis was bearded, wearing a black cap and wearing a black headband with the inscription, in Arabic: "We are ready to sacrifice for you, O Mohammad." He was carrying a blue sports bag, and armed with a sawn-off pump-action shotgun. The shotgun was old but could fire four shots in five seconds. Monis used hostages as
human shields. He had chained and locked the automatic sliding glass doors of the café. Monis claimed there were four "devices" located around Sydney. Then New South Wales Police Commissioner
Andrew Scipione said that none of the alleged devices were found during searches. Monis also demanded that a hostage ask all media to broadcast that "this is an attack on Australia by the Islamic State". In addition, he demanded that an Islamic State flag be delivered to him, although the request was never fulfilled. Hostages were ordered to hold up a
Black Standard flag, with the
shahādah in white Arabic letters (an Islamic
creed declaring: "There is no God but
Allah, and
Muhammad is the messenger of God"), against the window of the café.
Mamdouh Habib said he knew Monis well and offered to help the NSWPF negotiate with him. He believed that Monis was "sick and disturbed" over his failure to gain access to his children, and said Monis could trust him to get his message out. Lawyer Manny Conditsis had represented Monis and had also offered help because he said that Monis respected what he had to say to him. Barrister Michael Klooster who had met Monis in the café before the siege called the police at 2:17pm. Other Muslim leaders also offered to help, including the Grand Mufti of Australia,
Ibrahim Abu Mohamed. All such offers were rejected by the police because they had no control over what the untrained negotiators might say or do. This approach would be consistent with the
Behavioral Change Stairway Model. However, Mikhael stated that no such negotiation took place. The social media profiles of the hostages were also used to relay demands. During the early stages of the siege, the Australian Government and the NSW authorities did not label the event as a terrorist attack. However, as the siege continued, NSW Police authorised the engagement of the state's counter-terrorism task force, treating the incident as an act of terrorism.
Escape of first five hostages At around 3:37pm, two hostages,
John O'Brien and barrister Stefan Balafoutis, escaped from the front entrance of the building, followed by a third hostage, café employee Paolo Vassallo, who ran out from a fire exit at the side of the building. At around 4:58pm, two female hostages, both employees, Jieun Bae and Elly Chen, escaped by running from another entrance of the building and were met by
Tactical Operations Unit officers. After the escape, Monis threatened to kill hostages. The police State Technical Investigation Branch planted a
covert listening device in the café during the night. At one point, the device picked up Monis saying that he wanted to kill any escaping hostages.
Breach and hostage rescue At 2:03am on 16 December, a "very loud bang" was heard as Monis shot towards six hostages fleeing from the building. At 2:11am Monis fired a shot towards the kitchen, and was heard on the police listening device reloading his shotgun. The hostage Fiona Ma then escaped through the front door, and two
Tactical Operations Unit teams were ordered to move very slowly towards the two entrances. At 2:14am, four minutes after the Tactical operations teams were ordered in, Monis shot Tori Johnson in the back of the head, killing him. The execution was witnessed by TOU sniper Sierra 3-1, who reported a hostage down. TOU Operators armed with
M4A1 carbines threw eleven
stun grenades as they stormed the café. Monis was shot in the head. TOU Officer A – later identified as Ben Besant, whose identity was the subject of a suppression order only lifted in 2024 – stated that "I watched the (Carbine) laser ... from the centre of his chest go to his head and his head exploded and he fell". Besant fired a total of 17 rounds, and Officer B fired 5 additional rounds. Some fragments of those rounds killed hostage Katrina Dawson. Three other hostages and TOU Officer B were injured by crossfire. Police declared the siege over soon after, later confirming that Monis was killed in the hostage rescue. Two hostages had died, and another three were injured by police bullets. TOU Officer B, whose face was grazed by a police bullet, was discharged from hospital later in the day. At the inquest, Counsel assisting the coroner, Jeremy Gormley SC, said, "No shot fired by Mr. Monis, other than the one that struck and killed Mr. Johnson, struck anyone." It was initially unclear why 22 shots were fired by police, of which 13 hit Monis. The rounds were continuously fired in the belief that the hostage taker could reach for a bomb trigger.
Flag raids At around 2:00pm on 15 December, police contacted Rebecca Kay, a member of the Muslim community, and asked her to help source an ISIS flag for Monis. Kay contacted many people in the Muslim community but ultimately the police sourced their own flag. However, the flag was never given to Monis. The following day, NSW and Federal Police raided three homes of people who had been contacted in the attempt to source the flag. Kay assumes that her conversations had been monitored. Kay said she would help police in another crisis, but "with this incident they have not built trust at all. You don't understand...the fear that [the AFP and ASIO] create, and how they stalk...members of our community..." TOU snipers could not fire due to "the narrow windows, the moving around of Monis, the risk to hostages if there was a missed shot, (and) the position of the snipers behind glass". At 11:00am, Operational Commander
Mick Fuller approved negotiations for the release of half of the 18 hostages in return for Monis being allowed to talk on ABC radio. However, the Negotiation Commander decided not to do so because it conflicted with a standing policy to not negotiate with terrorists. The first negotiator was not told that the Grand Mufti of Australia and a barrister who represented Monis had offered to help negotiate with Monis. He only found out about Monis's demand for the ABC to broadcast that Australia was under attack after a Facebook post from one of the hostages was read out on radio 2GB. Monis had also demanded that the Christmas lights be turned off. The first negotiator thought that doing this would have provided an opportunity to bargain with Monis, but he did not hear back from commanders as to whether it was possible so "discarded" the option. It was later revealed an
Ausgrid team had assembled to switch off the lights, but was sent home. A third negotiator later said that he did not have the Christmas lights turned off because he had to have reassurance that the hostage taker would not carry out his threat to kill Win Pe. He said there was some "step-by-step" process to have the hostages released (after nineteen hours). Jenkins says he would have liked the Christmas lights turned off quickly, and was unaware that this had been found to be possible. Jenkins was also not told about the Johnson text near the end of the siege that Monis wanted to release a hostage. An unnamed civilian Forensic Psychiatrist was the consultant for NSW Police. The psychiatrist gave forensic advice that Monis was probably undertaking a grandiose act to be recognised as a figure of great infamy rather than wishing to hurt anyone. He doubted that Monis actually represented ISIS because he did not have the correct flag, nor that his actions were politically motivated. The psychiatrist warned that "a wounded narcissist is a dangerous specimen", as none of Monis' demands were met.
Timeline of events Here is the timeline of events during the siege in Lindt café. All times given are in
Australian Eastern Daylight Time, (
UTC+11:00). ==Hostages==