Portugal detects 13 cases of Omicron tied to a soccer team.

Portugal on Monday said it had identified 13 cases of the Omicron variant of the coronavirus, all tied to Belenenses, a soccer club that was forced to take part in a top-flight game over the weekend that was abandoned while in progress.

The country’s national health institute said that the 13 people were isolating and that they were all players or staff members of Belenenses, which fielded a depleted team of only nine players against Benfica on Saturday after reporting a coronavirus outbreak.

The institute also confirmed that one of the 13 people was a player who had recently returned to Portugal from South Africa, whose scientists helped identify Omicron. Benfica’s players will be tested for the virus, the country’s general health director, Graça Freitas, told the local TSF radio station.

Before the game on Saturday, as many as 17 players and staff members of the Belenenses club tested positive for the virus, although it was unclear at the time whether those cases involved the new variant. The Belenenses players sought to have the game canceled, but officials reportedly told them that it had to go on.

Separately, Portugal’s health authorities said they were tracing more than 200 passengers who had arrived in Portugal on Saturday from Maputo, Mozambique. At least two people on the flight had tested positive for the virus, but the authorities said it was too early to confirm whether these were Omicron cases.

Portugal on Monday began suspending all flights to and from Mozambique, which is a former Portuguese colony and shares a border with South Africa, over concerns about the new variant.