The Northern Territory has declared Greater Melbourne a COVID-19 hotspot as a virus cluster linked to the quarantine hotel continues to grow.
The outbreak, connected to the Holiday Inn at Melbourne Airport, has grown to 13 cases, with Victoria set to go into lockdown from 11.59pm on Friday.
The new cases include a female assistant manager and four close contacts of people who earlier tested positive for the virus.
The hotspot declaration includes Melbourne Airport, where the Brunetti cafe in Terminal 4 was listed as an exposure site early Friday morning.
People who arrive in the NT from 10.45am on Friday will be required to go into supervised quarantine at the Howard Springs facility.
Anyone who arrived in the NT from Melbourne Airport from February 7 is advised to get tested for the virus and self-quarantine until a negative test result is returned.
In a statement on social media, NT Chief Minister Michael Gunner said the snap decision was due to "extreme concern" over the situation unfolding in Melbourne.
The Holiday Inn has been closed until further notice for cleaning as contact tracing continues.
More than 135 hotel staff were stood down and told to isolate for 14 days, while 48 guests moved to the Pullman Melbourne to complete their quarantine period.
The NT has recorded 103 COVID-19 cases. All have been quarantine facilities
