The ACT has recorded its third coronavirus death, chief health officer Dr Kerryn Coleman says.

Key points: A woman aged in her 60s, who was infected on the Ruby Princess cruise ship, has died

A woman aged in her 60s, who was infected on the Ruby Princess cruise ship, has died More than three-quarters of the 103 Canberrans diagnosed with COVID-19 have now recovered

More than three-quarters of the 103 Canberrans diagnosed with COVID-19 have now recovered The ACT Government has fielded 175 complaints about people ignoring health guidelines

The woman, aged in her 60s, contracted COVID-19 while aboard the Ruby Princess cruise ship.

She died in the Canberra Hospital.

Health Minister Rachel Stephen-Smith said the death was "heart-breaking" for the woman's relatives.

"On behalf of the ACT Government and the Canberra community, I extend my deepest sympathies and our deepest sympathy to her family and friends in this really terrible situation," she said.

"It is a reminder to all of us of the devastating consequences that can occur from COVID-19 outbreaks, and why we are all working so hard together to flatten the curve and reduce the risk of spread of COVID-19 in the ACT and across our community."

No new cases of COVID-19 were diagnosed in Canberra over the past two days.

A total of 103 cases have been identified in the ACT, and 77 of those people have already recovered.

Easter weekend saw little growth in cases

Yesterday, ACT Chief Minister Andrew Barr expressed his pleasure with most Canberrans for following health advice over the long weekend.

Just one new case was reported over the Easter break.

But Mr Barr warned against complacency, after ACT Policing noted that some locations, such as IKEA and a popular walking circuit around Lake Burley Griffin, were at times too crowded.

"The fantastic work that people have been doing — day in, day out for weeks — can all be undone by one large crowd gathering," he said.

Police also turned back some Canberrans who were headed to the coast, though no fines were issued.

21 businesses 'under investigation' for non-compliance

The ACT's health protection service is investigating 21 businesses after the Government fielded reports they were breaching public health guidelines.

Access Canberra said the reports were among 189 complaints it had fielded over the past week on its website and via its new COVID-19 helpline.

The government agency said about two-thirds of the complaints related to people; the rest involved businesses.

The Government set up the helpline — (02) 6207 7244 — as a "simple channel" to provide advice and information about the coronavirus pandemic. About 10 staff are answering calls from 8:00am to 8:00pm each day.