Polish discus thrower Piotr Malachowski has sold the silver medal he won at the Rio de Janeiro Olympics to help pay for the medication of a 3-year-old boy suffering from eye cancer.

Malachowski said on Facebook that siblings Dominika and Sebastian Kulczyk, among the richest Poles, "declared the intention to buy my silver medal," which he put up for auction to help pay for treatment of the boy, Olek, who is suffering from retinoblastoma.

Malachowski did not reveal the amount raised, but said the target -- which was almost $130,000 -- has been met.

"My silver medal is worth much more today than it was a week ago," Malachowski said.

