Staff at a Tesco Extra store in Cardiff, are self-isolating after a colleague tested positive for coronavirus.
Those affected are colleagues at the Pengam Green store in Eastern Bay Road.
It is not known how many staff members are off work but a spokeswoman for the company described it as "a small number".
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In a statement, the spokeswoman said: “A small number of colleagues at our Cardiff Pengam Extra are self-isolating after one colleague tested positive for Covid-19.
"The safety of our colleagues, customers and suppliers remains our number one priority and we are following all government guidance and taking the relevant precautions.
"We have extensive measures across all of our stores to help keep everyone safe, including protective screens at every checkout, social distancing signage and regular deep cleaning.”
