Los Angeles is offering free coronavirus tests to all residents, regardless of whether they are displaying any symptoms.
Mayor Eric Garcetti made the announcement just hours after Los Angeles County reported its largest daily increase in new Covid-19 cases.
Until now, only essential workers and those displaying symptoms could receive tests due to a scarcity of kits.
It comes as California is expected to close all beaches across the state.
Los Angeles County currently accounts for almost half of California’s confirmed coronavirus cases. The state has so far reported over 48,000 cases and more than 1,900 deaths.
On Thursday, Mr Garcetti urged all of the city’s residents to get swabbed after earlier tweeting that “LA is now the first major city in America to offer free Covid-19 testing”.
Meanwhile, California Governor Gavin Newsom is expected to sign an executive order to close all beaches and parks in the state after large crowds packed public spaces over the weekend.
While some of California’s beaches have been closed for weeks, others have remained open with social distancing rules in place.
Mr Newsom recently said that he was just weeks away from lifting some restrictions. But the recent images of crowded beaches in the most populous US state led to a warning from the Democratic governor that the behaviour of some Californians threatened to undo weeks of work to restrict the spread of Covid-19.
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