The British government faced huge questions over its coronavirus testing system after a big increase in the number of positive cases over the weekend that was blamed on a technical glitch.

The main opposition Labour Party has asked the government why the cases were not tabulated when they should have been. Health Secretary Matt Hancock is due to make a statement to lawmakers later today.

Public health officials revealed on Sunday that 15,841 virus cases weren’t tabulated from Sept 25 to Oct 2. While all of those who tested positive were informed of the results, authorities weren’t able to trace and notify the people they had come in contact with, Public Health England said.

The government said the “technical issue” was discovered on Friday night and has now been resolved.

Read the full AP story here.