Portugal's national health institute, INSA, has reported 13 cases of the new Omicron variant of COVID-19 at Belenenses SAD.

B-SAD were forced to face Benfica on Saturday with just nine players - including two goalkeepers - after positive tests for 13 members of the squad.

Benfica went into half-time 7-0 up and B-SAD were forced to forfeit shortly after the restart due to insufficient players as injuries reduced the hosts - who were without any substitutes - to six men.

Among the B-SAD players to miss out was Cafu Phete, who had recently spent time in South Africa - where the Omicron variant was first detected - and it now appears that he and the other 12 members of the squad have tested positive for this new strain of coronavirus. 

"Preliminary tests carried out at INSA strongly suggest that all 13 cases associated with players of Belenenses SAD are linked to the variant of concern Omicron," INSA's statement to Publico read.

"The predictive value of the tests carried out is already very high."

Benfica's players are set to be tested as Portuguese authorities respond to the Omicron variant being found inside the country's borders.

"We'll have more proactive isolation and a more intensive testing of contacts," Graca Freitas - Portugal's Director-General for Health - told TSF. 

Flights into Portugal from Mozambique have now been banned, while two positive cases were discovered among the 218 people to have arrived on the last such flight on Saturday.

Portugal's Primeira Liga was the laughingstock of Europe on Saturday due to the farcical scenes that took place in Benfica's trip to coronavirus-ravaged Belenenses SAD, a game that was ultimately forfeited by the hosts.

B-SAD, a controversial offshoot of historic club Belenenses, were plunged into crisis this week when 13 of their players tested positive for coronavirus – among them was Cafu Phete, who had recently been in South Africa, where the new Omicron variant of the virus was first detected.

Despite the depleted nature of their squad, club president Rui Pedro Soares confirmed earlier in the day they had not asked Benfica to postpone the fixture, seemingly to the dismay of players who published coordinated messages to social media as the match kicked off in Oeiras, Lisbon.

The statement read: "Football only has heart if it is competitive. Football only has heart if it is really sporting. Football only has heart when it is an example of public health. Today, football lost its heart."

B-SAD started the match with just nine players on the pitch, many of whom were members of their Under-23s side, and that included goalkeeper Joao Monteiro playing in defence.

Benfica were ahead inside 24 seconds thanks to an own goal by Eduardo Kau; while the visitors did not score again until the 14th minute, the writing was on the wall.

They were 7-0 up at half-time thanks to a Darwin Nunez hat-trick, Haris Seferovic brace and a solitary Julian Weigl goal.

"What is this? Am I the only one who doesn't understand why the game hasn't been postponed?" asked former Benfica player Bernardo Silva on Twitter.

B-SAD did return to the pitch for the second half but with only seven players, and as soon as the game resumed, the hosts put the ball into touch and another player dropped to the turf citing an injury.

The referee called a halt to the game due to B-SAD running out of players, with teams required to have a minimum of seven on the pitch.

It has not been confirmed whether Benfica will be awarded just a 3-0 win, as is standard for a forfeiture, or take the full 7-0 scoreline.