According to this article from the Zimbabwe Independent, the Mugabe government is blocking non-profits from offering assistance to the 300,000 squatters whose homes and businesses were destroyed early this month.
It's an interesting but little-known fact: in countries around the world, humanitarian groups have to ask the government for permission to assist the needy. Without official permission, there's nothing to be done.
All the more reason, then, for squatters to form strong local organizations. Local action is the key to squatter survival.