Showbiz
Rex Features
The 62-year-old was rehearsing a fight scene for the action film when he hurt his thumb, says WENN.
The project, which will also star Jet Li, Mickey Rourke and Jason Statham, tells of a team of mercenaries sent to a South American country to overthrow a dictator and liberate its people.
A spokesperson said: "Mr. Stallone injured his hand practising realistic fighting for his upcoming film The Expendables. The injury was to his thumb, [but] the production will be on location in Brazil later this month and then New Orleans."
Stallone has written the screenplay for the Nu Image/Millennium Films project, and will also direct.
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