A 13-year-old boy bled to death on a Brazillian beach after being bitten on the thigh in a sickening shark attack.

Deivson Rocha Dantas was playing with his friends when a shark appeared and attacked him from behind at a popular beach on the South American country's east coast.

Thet tragic incident happened off the coast of Chifre beach in Brazil's tourist hotspot Pernambuco. 

THIS IS A BREAKING NEWS STORY AND IS BEING CONSTANTLY UPDATED...