The aid was to go to UNRWA. As the truck drivers started unloading the aid, Hamas gunmen opened fire on them and forced them to go to Hamas-run stores.
The Palestine Press Agency has many angry comments from readers about the episode.
(The first news flash about this occurred about 6 hours ago. Even so, this has not yet been reported in any English language media - not even Petra's English service. Here's Petra's Arabic original story.)_)
