New Zealand on Friday suspended its quarantine-free travel bubble with Australia for at least eight weeks due to a growing COVID-19 cluster in Sydney.

New Zealand recently imposed quarantine restrictions on travelers from New South Wales, Victoria and South Australia states, where lockdowns have been introduced to contain delta variant clusters.

Prime Minister Jacinda Ardern said quarantine-free travel would be suspended from anywhere in Australia from 11:59 p.m. New Zealand time.

New Zealand suspended travel with Australia for at least eight weeks after New South Wales, Australia, reported 136 new infections in Sydney within a 24-hour period (iStock)

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Ardern said she hoped to have all New Zealanders who wanted to return flown home from Australia with managed flights within a week.

The travel bubble has existed since April and has provided both countries with their only quarantine-free international flights.

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Both Australia and New Zealand have been among the most successful in the world in containing coronavirus outbreaks. But Sydney is failing to contain a cluster of the highly contagious delta variant, which has spread across the country.

On Friday, New South Wales state declared an emergency over the Sydney outbreak. Authorities reported one fatality and 136 new infections in the latest 24-hour period, the biggest daily jump since the outbreak began in mid-June.