New South Wales has recorded 18 local cases of Covid-19 overnight as Premier Gladys Berejiklian confirmed a decision will be made on Wednesday as to whether Sydney's lockdown will end on time on Friday night.
Of those locally-transmitted cases, 11 were in isolation for the entire time they were infectious, but two were infectious while out in the community.
Ms Berejiklian said another five were self-isolating for part of their infectious period.
Authorities have linked all but two of the 18 cases - nine of which are household contacts - to known cases. The new infections were reported from 32,136 tests in the 24 hours to 8pm.