A worker accidentally mixed pool chlorine and hydrochloric acid, used as a cleaning agent, at the Pullman Hotel.

As the number of reported attacks ballooned and suspected copycat attacks were reported, police issued a warning about the seriousness of the crime.

Two people died, a dozen more were hospitalised and hundreds others sought medical assistance after suspected drug overdoses at a music festival in Sydney, the police said.

Australian Federal Police Detective Superintendent Michael McTiernan said the charges were "serious and significant".

New South Wales Police said on Tuesday the 37-year-old man picked up three teens in the city after midnight on Sunday.

Qatar Airways’ “award-winning” business class experience- Qsuite will be available on flights to and from Canberra, its newest Australian destination, via Sydney, from July 1.

“I urge countries around the world to lower the entire burden of taxes and charges on aviation if the sector is to grow,” de Juniac said at a media roundtable in Sydney.

Akbar al-Baker is the 77th chair of the IATA BoG and the first CEO from Qatar Airways to hold the position. He has served on the BoG since 2012.

Police were called to the hotel to cut out the driver, who was unharmed.

The World Air Transport Summit and the 74th Annual General Meeting of the International Air Transport Association in Sydney, Australia, in early June will focus on key issues concerning the global aviation industry.

There has been growing concern over attacks by radicals inspired by Islamic State and other groups, with a foiled effort last year in Sydney to target an Etihad flight with a crude bomb.

The man plans to invest the money in some Sydney real estate, buy a new car and "a holiday to Honolulu goes without saying".