BEIJING - Authorities in China have reported 57 new cases, the country's highest daily jump since mid-April.

The National Health Commission said 38 were locally transmitted, with 36 of them in Beijing.

Since yesterday, lockdown measures have been re-introduced in some localities of the capital after dozens of new infections were discovered. Many have been linked to a local market, which has been closed. Eleven residential compounds nearby have also been sealed off, with resident only allowed to leave for essential shopping.

More than 84,000 cases have been reported in China, according to Johns Hopkins University, along with 4,638 deaths.

The country has relaxed many of its containment measures after the ruling Communist Party declared victory over coronavirus in March. But a recent rise in cases has sparked fears of a second wave of infections.(FA)