Report: NSA leaker Snowden offers to help Brazil investigate spying if given political asylum

One of Brazil's biggest newspapers says it has obtained a letter from National Security Agency leaker Edward Snowden, asking for political asylum and offering to help Brazil investigate U.S. spying on its soil.

In the letter published on Folha de S. Paulo's website early Tuesday, Snowden says he could legally offer assistance only if he is granted asylum.

Snowden is now living in Russia, where he was granted temporary asylum for a year.