Caution needed with Gaza casualty figures
By Anthony Reuben
Head of statistics, BBC News
The IDF say they have killed at least 253 Hamas operatives, 147 Islamic Jihad operatives, 65 "operatives of various organisations" and 603 "operatives whose affiliation is unknown", although they also stress that this is not a final number.
Spokesman Capt Eytan Buchman told BBC News that "the UN numbers being reported are, by and by large, based on the Gaza health ministry, a Hamas-run organisation".
He said that part of the reason for the discrepancy between the figures was "when militants are brought to hospitals, they are brought in civilian clothing, obscuring terrorist affiliations".
"Hamas also has given local residents directives to obscure militant identities," he said.
"It's important to bear in mind that in Operation Cast Lead [the last Israeli ground offensive in December 2008-January 2009], Hamas and Gaza-based organisations claimed that only 50 combatants were killed, admitting years later the number was between 600-700, a figure nearly identical to the figure claimed by the IDF."