Original sentence: The Gaza flotilla raid was an Israeli naval forces boarding of the "Gaza Freedom Flotilla", an aid convoy of six ships carrying 663 people from 37 nations, including pro-Palestinian activists  (some of whom had ties with Hamas ) and journalists, on 31 May 2010 in the Mediterranean Sea in international waters off the Gaza coast
Edited sentence: The Gaza flotilla raid was an Israeli naval forces boarding of the "Gaza Freedom Flotilla", an aid convoy of six ships carrying 663 people from 37 nations, including pro-Palestinian activists  (some of whom had ties with terrorist organizations such as Hamas ) and journalists, on 31 May 2010 in the Mediterranean Sea in international waters off the Gaza coast