Samuelsson triumphed first in the men's 15-kilometres mass start in Oberhof as he produced a flawless performance from the shooting range before crossing the line after 36min 42.8sec.

He was just over a second behind compatriot Martin Ponsiluoma going into the final lap but managed to power past him over the decisive three kilometres to subject his team-mate to silver, 9.6 behind.

The five-time Olympic champion Johannes Thingnes Bø of Norway, who also has five golds from these Championships, settled for bronze with 37:21.6 on the clock after a penalty-riddled run.

"It is fantastic," said Samuelsson.

"I never believed that I could be world champion this year.

"It was a hard season for me.

"These World Championships for me, have been truly amazing.

"What I am most happy about today is my great, great performance.

"I just focused on myself on the shooting range, just tried to hit those targets.

"I am very happy that I succeeded.

"Today is the best race of my career so far."

Oeberg then finished the Championships as a double gold medallist with a 36:48.0 victory in the women's 12.5km mass start.

She climbed to pole position late on as leader Julia Simon of France was penalised, also giving Norway's Ingrid Landmark Tandrevold silver, 4.8 seconds off the pace.

Simon had to make do with bronze as she clocked in after 37:08.8.

"It is like a dream," Oeberg said.

"I am just enjoying this so, so much.

"I thought it would be hard after two penalties in the first two prone.

"But my standing shooting has been working so well and I was so inspired by the boys earlier.

"It is unbelievable!" 

The results moved Sweden into second on the overall medals table with three golds, three silvers, and five bronzes.

Norway topped the standings with five gold medals, three silver, and three bronze while France's two gold and two bronze were enough for third place.