CAIRO/JERUSALEM, May 21 (Reuters) - Israel allowed 100 aid trucks carrying flour, baby food and medical equipment into the Gaza Strip on Wednesday, the Israeli military said, as UN officials reported that distribution issues had meant that no aid had so far reached people in need. Netanyahu said an Israeli air strike this month had probably killed Hamas leader Mohammed Sinwar and he reiterated his demand for the complete demilitarization of Gaza and the exile of Hamas leaders for the war to end. Israel launched its campaign in Gaza in response to the Hamas attack on October 7, 2023, which killed some 1,200 people by Israeli tallies and saw 251 hostages abducted into Gaza.