In Defending the Watch Tower Society, the Governing Body says in JW.org:
Charity. We have provided material relief to those suffering from tragedies—whether man-made, such as the 1994 genocide in Rwanda, or natural, such as the 2010 earthquake in Haiti.
http://www.jw.org/en/jehovahs-witnesses/faq/watchtower-society/
However, we know that this charity is not given to people who is not in the sect.