In a film scene Hrithik was to jump from the building with "safety cable" tied to his leg but as the actor tried the stunt the cable broke and he came crashing down.
However, the actor landed safely on a net placed below as a precautionary measure.
"Hrithik has slightly injured his back but would come in full form for the shoot in a couple of days," the sources said.
Hrithik has been shooting for home production 'Krissh' in Singapore for a month.
The actor called up his mother Pinky Roshan and wife Suzzane to inform that he was safe.