Coronavirus cases in NSW have jumped to almost 270 while a fifth person in the state and sixth nationwide has died of the illness.

Health authorities on Wednesday also admitted the number of COVID-19 cases in NSW with no known source of transmission was increasing.

NSW Health on Wednesday afternoon confirmed an 86-year-old man previously confirmed to have COVID-19 died on Tuesday night in a Sydney hospital.

NSW chief health officer Kerry Chant earlier said there were 267 confirmed coronavirus cases in the state, up from 210 on Tuesday.

More than 25,000 tests have been conducted.

Dr Chant attributes the rise to an influx of Australians returning from overseas as citizens around the world return to their home countries.

“What we’ve been seeing is increasing cases in returning travellers from Europe and also America adding to those previous countries we’ve had – the original ones,” Dr Chant told reporters in Sydney.


“The outbreak has changed and evolved.”

NSW schools will remain open but there’ll be no assemblies and strict bans on sick students and teachers. Regular hand washing will be enforced.

Premier Gladys Berejiklian this week announced a $2.3 billion economic package including $700 million for health care and $1.6 billion for job creation and tax relief. Ms Berejiklian on Wednesday reiterated her confidence NSW would pull through the crisis.

“When we stick together, all the states and the national government working hand in hand, with good people advising us on a daily basis … good, sound decisions will be made,” the NSW Liberal leader told reporters.

Universities are suspending face-to-face classes, businesses are urging staff to avoid the office and a string of major events have been cancelled in an attempt to keep the coronavirus in check.

The University of Technology Sydney has said 27 students and one teacher are in self-isolation after a confirmed coronavirus case on campus.


Macquarie University has also suspended classes after a student was infected while the University of Sydney will deliver all classes online from March 23.

Residents flouting a ban on mass gatherings can be fined $11,000 or jailed for up to six months while NSW Police is halting major roadside drug and alcohol testing operations due to hygiene concerns.

Police Deputy Commissioner Gary Worboys on Wednesday said officers would continue to conduct mobile random breath testing and there’d be an increased police presence around shopping centres and hospitals.

NSW Opposition leader Jodi McKay wants more COVID-19 testing with fast-tracked results.

The Labor leader said anyone showing symptoms – not solely those returning from overseas or in contact with confirmed cases – should be tested.

“In South Korea they’re testing 15,000 people a day … and they’re getting the tests the next day,” Ms McKay told reporters on Wednesday.


“Here we know of people who are waiting up to a week to get their test results. These test results must be given immediately and everyone who seeks a COVID-19 test must be given one.”

Music festival Splendour in the Grass has been postponed until October while Groovin the Moo was cancelled outright.

Australia on Wednesday upgraded its international travel advice to the highest level with citizens told not to travel overseas.