A hotel and casino resort in the world's biggest gambling hub of Macao was locked down by authorities with 700 people inside on Tuesday (Jun 21) due to a coronavirus infection outbreak on the property, local broadcaster TDM reported.

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The lockdown comes as the Chinese special administrative region carries out a two-day mass testing of its more than 600,000 population after dozens of locally transmitted coronavirus cases were discovered over the weekend.

Footage obtained by the broadcaster and industry publications showed police officers in protective gear sealing the complex to prevent people from entering or leaving. Government officials were also preparing COVID-19 tests for the hundreds of people inside.

Fortuna, an aged gaudy property located on Macao's main peninsula, is a satellite casino under the umbrella of SJM Holdings the entity created by former Macau kingpin Stanley Ho.

Its casino was headed by local businessman Sio Tak Hong, who was arrested last year for alleged corruption and money laundering.

The hotel and the government did not immediately respond to request for comment.

Macau's previous coronavirus outbreak was in October last year and the city has not previously had any large-scale quarantine or lockdowns. Dozens of cases have emerged since the weekend but still far below daily infections in places including neighbouring Hong Kong where infections have jumped to more than 1,000 in recent days.