On its website, the city municipality stated that the strong recommendation to use face masks currently in force had not had the desired effect, so the switch would now be made to a mandatory requirement.
Face masks must now be used in the city in most indoor places which are open to the public, including shops, shopping centres and restaurants. The measure is in place until January 9th.
Of the 24 new cases of Covid-19 detected in Trondheim on Tuesday, 11 have so far not been possible to trace to a known infection chain, although contact tracing is ongoing, NTB reports.
The city has also increased testing, the news agency writes.
Norway’s public health authority NIPH said on Wednesday that the infection rate in the country was currently “flat”, but still subject to a high risk of resurgence.
Last week saw a total of 2,685 cases of Covid-19 registered across Norway, a 6 percent increase from the preceding week. But testing also increased between the two weeks, by 8 percent.
The test positivity rate remained stable at around 2.35 percent, according to the latest weekly report issued by the NIPH.
Capital city Oslo and eastern county Viken remain the highest with the highest infection numbers, and currently constitute around two thirds of all new Covid-19 cases in the country.
The number of Covid-19 inpatients in Norwegian hospitals fell significantly to 62 in the last week, having stood at 106 the week before. 22 people in Norway lost their lives to the virus in the last week.