New 'mistress' details emerge in F1 boss's alleged murder

Further details have emerged in the alleged murder of F1 and motorsport figure Nathalie Maillet, the CEO of the Spa Franchorchamps racing circuit in Belgium.

The motorsport world was left shocked earlier in the week by news of the 51-year-old's death, with tributes pouring in from around the world.

OUCH: Supercars driver discovers brutal injury months after it happened

'DON'T KNOW': Teammate at a loss over Daniel Ricciardo's F1 battle

More information is coming to light in Maillet's death, which Belgian authorities believe was at the hands of her husband, Franz Dubois.

After Dubois encountered Maillet with another woman, alleged mistress Ann Lawrence Durviaux, police believe he shot both women, before taking his own life.

A statement from the police prosecutor from the Belgian province of Luxembourg detailed the theory.

“At 00:10, the bodies of two women and one man were discovered by the police in a house in Gouvy, all three presenting gunshot wounds,” the statement said.

“According to our information, the male individual voluntarily used his firearm to kill both women, including his wife, before killing himself.”

Maillet's death sent shockwaves through the motorsport community, with tributes flowing for the highly regarded CEO.

The 51-year-old was praised for her work in a statement released by the Spa Franchorchamps circuit, which she became CEO of in 2016.

"It is with great sadness that the team of the Spa-Francorchamps circuit have been informed of the death of Nathalie Maillet, CEO," read the statement.

"On this very sad day, the whole staff wish to present their most sincere condolences to Nathalie's family and friends.

"The circuit, but also motor racing, has lost today a passionate woman, strong in her convictions and always looking to the future."

Maillet was described as a 'true leader' by Spa Franchorchamps chairman Melchior Wathelet.

"My thoughts are with Nathalie's family, her parents, her loved ones and her teams," he said.

"Today, we are losing a highly respected lady, a true leader who will be greatly missed. Nathalie had become the face of the circuit, she embodied the passion for racing that we all share.”

Formula One, motorsport world mourns Nathalie Maillet

Formula 1, which will resume with the Belgian GP at Spa on August 29, put out a statement of their own praising Maillet and mourning her loss.

"We are deeply saddened by the awful news that our friend Nathalie Maillet has died," the statement read.

"The whole of Formula 1 sends its deepest condolences to her family and friends.

"The motorsport community has lost an incredible person and we will all miss her greatly."

Maillet was a trained architect who was passionate about motorsport, enjoying a career behind the wheel before putting her skills to use at the Spa Franchorchamps circuit.

The circuit first held a Grand Prix race in 1925 and has hosted Formula One every year since 1985, with Maillet central in efforts to upgrade the circuit since she was elected CEO in 2016.

Her death sent shockwaves through the industry, with her counterpart at France's Le Mans circuit, Pierre Fillon, devatsated.

"We are particularly shocked and upset by this news. We were in regular contact over the past few years, in particular in relation to the FIA World Endurance Championship," he said.

"Nathalie was passionate about motorsport and spared no effort in defending our causes.

"On behalf of the Automobile Club de l'Ouest, I extend our heartfelt condolences to her friends and family and to the staff of Spa-Francorchamps. They can count on our support in this difficult time."

Watch 'Mind Games', the new series from Yahoo Sport Australia exploring the often brutal mental toil elite athletes go through in pursuit of greatness:

Click here to sign up to our newsletter for all the latest and breaking stories from Australia and around the world.