BEIJING (AP) — More than 2,000 tourists visiting China’s Inner Mongolia region have been sent to hotels to undergo two weeks of quarantine following the detection of new COVID-19 cases in the region.

The move follows reports of a COVID-19 outbreak in the vast, sparsely populated region that attracts visitors with its mountains, lakes and grasslands.

A regional government announcement on Friday said 2,428 visitors had been placed under observation at hotels in Baotou and Ordos cities.

This follows successive reports of new cases of local infection in the region, with Inner Mongolia accounting for 19 of the 48 new cases of domestic transmission announced on Friday.

Quarantines are typical of the strict measures China has taken to control the pandemic, which also include wearing masks, electronic case tracing, mass testing, lockdowns and vaccinations.

In the city of Lanzhou in Gansu province bordering Inner Mongolia, millions of people have been largely confined to their homes over the past week after cases were detected there. Ten new cases were reported in the city on Friday.

China has reported 4,636 deaths among the 91,665 COVID-19 cases recorded in the country since the first infections were detected in the central Chinese city of Wuhan in late 2019.

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