Police numbers have been increased across Sydney in response to yesterday's cafe siege which left two people dead, senior New South Wales officers have said.
There will be an increased police presence in public places, transport hubs and iconic locations such as the city's harbour.
Mick Fuller, the force's assistant commissioner, said the aim was to ensure all residents felt safe "during these testing times".
“We want the community of Sydney and for that matter NSW, to go about their day to day business with confidence and comfort in the knowledge they are safe,” assistant commissioner Mick Fuller said.
The New South Wales Police commissioner said he "couldn't be sadder" following the deaths of two hostages in the Sydney cafe siege.
Andrew Scipione told reporters: "It's incredibly sad - I don't think I could be sadder."
A Sydney DJ who spoke to one of the hostages trapped in the Lindt Chocolate Cafe has recalled the demands made by the lone gunman.
Ray Hadley told Good Morning Britain one of the hostages called 2GB radio station where Mr Hadley works, and relayed demands made by Man Haron Monis.
"He wanted an ISIL flag - pretty simple requests - he wanted to speak to the Prime Minister for five minutes. And he wanted the government...to say it was an ISIL terrorist plot and he wanted that broadcast on the radio."
The gunman nehind the Sydney café siege, Man Horan Monis, was not on a terrorism watchlist, Australian prime minister Tony Abbot has revealed.
He was, however, "well known" to police, Mr Abbott added.
Australian Prime Minister Tony Abbott has warned that people face a "very real threat" from extremists.
In a press conference after the 16-hour siege at a café in Sydney, Mr Abbot said there were people with the "will and capability" to carry out terrorist attacks in the country.
He said he shares people's "outrage" that gunman Man Horan Monis was allowed out on bail despite being implicated in a string of serious offences, and vowed that an investigation would be launched.
But he told reporters that he believed even if Monis had been under 24-hour surveillance, the seige may still have happened.
Australian Prime Minister Tony Abbott has condemned the "appalling and ugly" incident which left two hostages dead after a 16-hour hostage situation in Sydney.
In his first speech since arriving in the city, he said he refused to use the term "Islamic State", referring to it only as a "death cult" with "nothing to do" with any religion.
He also thanked New South Wales Police for their work in ensuring as many of the captives as possible escaped alive as he said it had been "one of the most difficult 36 hours in our history".
Earlier, he visited the scene of the attack where hundreds of people have laid flowers and left messages of condolence.
A Channel 7 presenter broke down in tears live on air as she realised she knew one of the victims of the café siege in Sydney.
Natalie Barr, who presents the channel's Sunrise programme, found out that mother-of-three Katrina Dawson - the sister of one of her friends - was among those killed in the 16-hour attack.
Reports claim Ms Dawson, aged 38, was trying to protect her pregnant friend from gunfire when she was shot and killed.
Miss Barr was co-hosting from the scene with fellow presenter David Koch when she realised who the victim was, and had to hand over to her colleague while she composed herself.
Australian Prime Minister Tony Abbott has flown into Sydney to pay his respects to the victims of a 16-hour armed siege at a café in the city.
The PM joined hundreds of others in laying flowers near the site of the attack and stood for a moment in silence, before writing a message of condolence in special books at the scene.
Hundreds of floral tributes have been laid near the café where two people were killed in a 16-hour hostage stand-off in Sydney, which ended with the death of the gunman.
Special trellis tables have also been set up to allow people to write messages of condolence.
Two pregnant women, a 75-year-old and a policeman were among those injured in the café siege in Sydney.
Police have said their officer was hit in the face with shotgun pellets, while the 75-year-old woman was shot in the shoulder.
The two pregnant women were taken to hospital for assessment.
All are said to be in a stable condition.