See the full press release in Arabic here, a roughly translated version of the press release in English here, and an English news brief on the press release here.
However, there has been no mention of such Israeli soldier deaths, injuries or kidnappings from the Israeli media. Israel insists that only 10 soldiers were killed during the war and 4 of them from friendly fire. Either Hamas is outright lying or Israel isn't telling the whole story. If the latter is true, it can be explained by the fact that the Israeli Military Censor strictly forbids news of soldiers deaths, rocket strikes, and troop movements from being published without it going through the news item first. This is so as to prevent aiding an enemy or harming the security of the state.
Zatzman in 'The Return of the Israeli Military Censor' writes of the Israeli Military Censor (IMC):
...the Israeli military censor has been and will continue to suppress publication of information it considers not appropriate to relay to the Israeli public at this time. Until now, the Israeli Military Censor had been trotted out, especially during the first Intifada, to keep the foreign press from reporting struggles waged or victories won by Palestinian military forces against regular Israeli military forces in the Occupied Palestinian Territories.
Read the full article here on the IMC's role during the Lebanon War.
Should the Hamas reports on the kidnappings be true, we can conclude that the establishment almost certainly wants to avoid creating another Gilad Shalit and the heat it would come under as a result. But would that warrant taking out their own soldiers?
Further, the lack of coverage on Israeli soldier casualties can be explained partly by the fact that the Israeli public is very sensitive to news of that kind, the occurrence of which could all taste very sour for politicians in their scramble for votes in the upcoming elections. But does censoring soldier deaths really assist the enemy or harm the security of the State according to IMC directives? Very unlikely. Rather, publishing the truth on the number of casualties allows the Israeli public the opportunity to judge for themselves whether or not they want this war and future wars of this kind. Moreover, it is the right of the Israeli public to know fully the extent of their army's wars - the real motives of going to war, the 'nature' of their 'enemy', the financial cost, and very definitely the human cost - on both sides, Palestinian and Israeli.
However, the establishment is not giving their public this right. It is censoring the truth. And it achieves this with the media's complicity. This is so that the upper echelons of society, those with political and capital gain at stake, are the only recipients of truth, the broadcasters of untruths and convenient truths, and the decision makers and fate sealers for their people and those that they occupy.