There are some “areas of grave concern” within the Covid-19 testing system in Northern Ireland, the chair of Stormont’s health committee has said.
Sinn Féin’s Colm Gildernew said the committee wanted to speak with Health Minister Robin Swann about the issues.
He said there had been “serious pressures” on testing in recent weeks.
On Saturday, the highest number of people tested positive for the virus since the Department of Health rolled out its current testing model.
There were 222 positive cases and then another 176 cases confirmed on Sunday.
There have been 977 positive tests in the last seven days.
Coronavirus-related death statistics are not updated at the weekend in Northern Ireland, where the death toll recorded by the Department of Health stands at 575.
In the Republic of Ireland, the Department of Health reported 396 additional cases of Covid-19 on Sunday and no further deaths – the death toll remains at 1,792.
Of the new cases, 241 are in Dublin – which is on its second day of elevated restrictions – and 70% of the new cases are under the age of 45.
Read more: BBC News