Lawyers for world-record sprinter Usain Bolt allege that almost all of his money is missing from an account at a private investment firm.

Bolt’s account is now reportedly at just $12,000 after originally holding $12.8 million.

«If this is correct, and we hope it is not, then a serious act of fraudulent theft or a combination of both has been committed against our client,» Bolt’s lawyers said in a letter to The Associated Press.

Jamaica’s Usain Bolt celebrates winning the gold medal in the men’s 4×100 meter relay final during the athletics competition at the 2016 Summer Olympics at the Olympic stadium in Rio de Janeiro, Brazil, Friday, August 19, 2016.
(AP Photo/Martin Meissner)

The lawyers say they will take civil and criminal action if the money is not returned within the next 10 days.

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The Jamaican Financial Services Commission is investigating Stocks & Securities Limited, the firm in question.

Jamaica's Usain Bolt celebrates winning the gold medal in the men's 200m final during the 2016 Olympic Summer Games in Rio de Janeiro, Brazil.

Jamaica’s Usain Bolt celebrates winning the gold medal in the men’s 200m final during the 2016 Olympic Summer Games in Rio de Janeiro, Brazil.
(AP Photo/David J. Phillip, File)

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«We understand that customers are eager for more information and we assure them that we are closely following the matter through all required steps and will alert our customers of the resolution as soon as that information is available,» the commission said.

Bolt’s lawyers sent the letter on Monday, the same day that the Jamaican Financial Services Commission announced that it was investigating the firm. A day later, financial authorities said they were temporarily taking over management of the private investment firm. You are allowed to continue trading, but you need government approval for any transaction.

Jamaica's Usain Bolt celebrates after leading the team to a gold medal in the men's 4x100m relay at the World Championships in Athletics at the Bird's Nest stadium in Beijing, Saturday, August 29, 2015.

Jamaica’s Usain Bolt celebrates after leading the team to a gold medal in the men’s 4x100m relay at the World Championships in Athletics at the Bird’s Nest stadium in Beijing, Saturday, August 29, 2015.
(AP Photo/Darron Cummings)

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Bolt holds the records for the 100 and 200 meters (9.58 and 19.19 seconds, respectively), and is part of the 4×100 team that achieved a world record of 36.84 seconds at the 2012 London Olympics.

Associated Press contributed to this report.