Calls are being made for a “full investigation” following the death of a worker from the DVLA offices in Swansea.
On Wednesday, Prime Minister Boris Johnson told MPs the UK government was working “flat-out” to control an outbreak of 500 cases at its sites in Swansea.
The DVLA has confirmed the death of a member of its staff, and offered its condolences to their family.
PCS Union general secretary Mark Serwotka said: “We are deeply concerned and saddened following the news of a staff member dying at DVLA.”
“There must be a full investigation into the circumstances.
“There is no doubt that insisting over 2,000 DVLA staff go into work every day is a recipe for further COVID cases and that increases the possibility of further deaths.”
A DVLA spokesman said: “We are greatly saddened by the death of a valued member of the DVLA family.
“Our thoughts go out to his family and all those who were close to him.
“Our focus throughout the pandemic is on staff safety and we continue to work closely with Public Health Wales and follow Welsh Government guidance to ensure that our sites are COVID secure.”
The agency said on Monday that there were currently four COVID cases across its estate, with none at its contact centre.
In December, a coronavirus outbreak was declared at its contact centre at Swansea Vale in Llansamlet, after 352 cases in the space of four months.