Eight more people who had tested positive for Covid-19 have died in Northern Ireland, bringing the total to 56.
There are currently 998 positive cases, a rise of 94 since Friday.
The Department of Health said 8,034 tests have now been carried out here.
A surge in cases is expected between 6 April and 20 April. Testing of healthcare staff began at the SSE Arena in Belfast on Saturday.
Kits from the Northern Ireland-based diagnostic company Randox will be used for testing.
From Dan Stanton, Reporter
There was a steady stream of NHS workers in their cars going into the first Covid-19 test centre for NHS staff in Northern Ireland.
Only employees with appointments were allowed to enter.
Others, without the correct documentation, were told to leave.
The testing tents – six of them – are located in the grounds of the SSE Arena car park which has now been cordoned off.
The opening of the testing centre comes days after similar test centres for NHS staff opened in England.
The Health Secretary Matt Hancock said he was planning to ramp up testing from 10,000 a day currently in England, to 100,000 per day by the end of the month.
Across the United Kingdom, 4,313 people with the virus have now died, with 708 deaths reported on Saturday. There are 41,903 confirmed cases.
In the Republic of Ireland, as of Friday, 120 people had died with coronavirus.