Kimura.se has the UFC press release:
[Madadi] had been kayaking in the Stockholm Archipelago and was about to buy lunch at a restaurant in Hornsberg, when he witnessed a child of one and a half years old falling from a nearby pier into the sea. The child’s father quickly dove in to help save his son.
Madadi, a former aspiring fireman, immediately jumped into the water and saved both father and child from the turmoil of waves and rapid currents.
A bystander who was very impressed with the performance of the athlete could conclude "If Reza hadn’t been there that boy would have drowned. One person wanted to take pictures of Reza with the father and the son, but Reza humbly declined, with respect to the family’s emotional status."LINK