http://www.naharnet.com/stories/en/220631-report-hizbullah-accused-of-involvement-in-peru-violence
There was real skepticism in the comments about this story in the Lebanon Press. I myself do not know. It does seem pretty far away from their home base. Teaming up with the Shining Path Guerillas sounds possible though.
They did bomb the Israeli embassy in Argentina
#1: Nahrnet is a very reliable news source
#2: As I added in our own report, there is a very solid source of Hezbollah activity in Latin America, even a quick search in Google will show you many items.
Here is the link (in Spanish)
http://www.infobae.com/2013/06/07/1072767-hezbollah-una-presencia-que-crece-america-latina/