Two off-duty police officers have been fined $1,000 each after breaching coronavirus restrictions by attending a party in the Sydney CBD at the weekend.

Key points: A senior constable got so drunk she needed to be taken to hospital

A senior constable got so drunk she needed to be taken to hospital Officers later found out she and another senior constable went to a party

Officers later found out she and another senior constable went to a party Gatherings of more than two people are banned under NSW's social-distancing shutdown

Officers spotted a 27-year-old female senior constable drunk about 8:30pm on Saturday.

She was being assisted by a 31-year-old man and officers soon found out the pair had been at a party at a nearby apartment.

The woman was taken to St Vincent's Hospital in Darlinghurst and discharged at 2:00am on Sunday.

Police later discovered a 27-year-old male senior constable attached to the Fairfield City police area command had also attended the gathering.

Two other women, 28 and 31, who were not in the police force, were also at the apartment.

All five people have been fined $1,000 for breaching the coronavirus social-distancing laws, which forbid a person from leaving their home unless it is for work, school, to get groceries or a limited number of other essential trips.

On Tuesday morning Premier Gladys Berejiklian urged everyone to "stick to the rules" of social distancing.

"It only takes a handful of people to do the wrong thing and it can spread the virus through the community," she said.

Last week NSW Police Commissioner Mick Fuller encouraged the public to dob in backpackers who were ignoring coronavirus restrictions around Sydney.

"The reality is the messaging that the Premier and Chief Health Officer have been giving over the last weeks and months has not been getting through to some people," Mr Fuller said when the laws were introduced.

In the past 24 hours, police have issued over a dozen fines for breaches of the coronavirus social-distancing shutdown, including four women who were seen in a car near North Nowra and two people also in a car near South Kempsey who said they were "bored".

The maximum penalty available under the act is $11,000 and six months in jail.

The laws are in place until June 29 and Mr Fuller has previously declared he would not seek an extension.