Businesses, schools and markets in Jiangcheng County in Yunnan province will close Monday and Tuesday while nucleic acid testing is carried out, the government said. Travel into and out of the county will be prohibited, reports Associated Press news agency.

Yunnan has reported a spike in infections traced to nearby Myanmar, where a military government that seized power in February is struggling to contain a surge in cases. Beijing has tightened border controls, the news agency reported.

Meanwhile, the Yunnan health agency reported five new infections.