From Israel MFA, 24 May 2010:
Ships forcing their way into Gaza will do nothing to aid the people there. Existing land crossings are more than capable of meeting their needs.
...In a typical week, 15,000 tons of supplies enter Gaza. Truckloads of meat, poultry, fish, dairy products, fruits, vegetables, milk powder, baby food, wheat and other staples arrive in Gaza on a daily basis. Building materials are also shipped in, when monitored by International organization so as not to be commandeered by Hamas for the fortification of bunkers.
Since the ceasefire in January 2009, well over a million tons of humanitarian supplies entered Gaza from Israel - that is almost a ton of aid for each man, woman and child in the Strip.
...Israel has invited the organizers of the flotilla to use the land crossings, in the same manner as all the reputable international organizations.
However, they are less interested in bringing in aid than in promoting their radical agenda, playing into the hands of Hamas provocations. While they have wrapped themselves in a humanitarian cloak, they are engaging in political propaganda and not in pro-Palestinian aid.
If the organizers were truly interesting in providing humanitarian aid - as opposed to engaging in publicity stunts - they would use the proper channels to ensure delivery of any supplies.
From Israel MFA, 27 May 2010:
Israel invites the international flotilla to unload its cargo in Ashdod port
The Minister of Defense has issued warrants prohibiting the entrance of the vessels to Gaza. Israel has advised the relevant countries [Turkey, Greece, Cyprus, Sweden and Ireland – the countries from which the ships participating in the flotilla set sail] of this ban, and requested they prevent the departure of the vessels.
...D-G Gal emphasized that Gaza is under the control of a terrorist organization, which does not prioritize the wellbeing of the citizens of Gaza. This organization, under the patronage of Iran, continues to arm itself with ammunition and rockets, and to perpetuate a situation of armed conflict with Israel, after years of targeting Israeli civilians. Israel has the inherent natural right, therefore, to prevent the unsupervised transfer of supplies to Gaza. The Deputy General added that Israel would not allow the flotilla to reach Gaza.
D-G Gal stressed that Gilad Shalit has been languishing in Gaza for four years, while the Hamas blatantly breaches his elementary rights, and does not even allow the Red Cross to visit him...