Lægreid won the men's 15 kilometres mass start to seal his fourth title at the Championships, adding to his triumphs in the individual, mixed relay and men's relay races.

The 23-year-old, who had not earned a World Cup victory until this season, pulled away on the last loop and finished in 32min 51.5sec.

Lægreid led a Norwegian one-two as Johannes Dale took silver, 10.2sec back, while bronze went to Quentin Fillon Maillet of France.

"I had a plan to not use too much energy in the first two loops and be really focused on the shooting," said Lægreid. 

"I did according to my plan and had some power for the last loop. 

"I am extremely satisfied…I try to not think that this is the World Championships.

"I try to imagine it like being a normal training day. 

"I know I shoot well in training - I know I can and today I did."

Hauser sprung a surprise in the women's 12.5km mass start, clinching her maiden world title in a time of 36:05.7.

The Austrian, who like Lægreid had not won a World Cup race until the 2020-2021 campaign, chose the perfect time to produce her first clean shooting performance of the season.

She ended 21.7 clear of Norway's Ingrid Landmark Tandrevold, who earned silver.

Tandrevold's compatriot and overall World Cup leader Tiril Eckhoff was forced to settle for the bronze medal.

"I had four times zero for the first time of the year and it just happened in the World Championships," said Hauser. 

"It is just unbelievable. 

"I am here now and totally on top of the podium.

"I'm the world champion in the mass start, so I do not know what to say."

Norway, as expected, finished well clear of the rest at the top of the medals table with a total of 14, including seven golds.

France were second on seven medals, two of which were gold, with Sweden third on six.