Complex sentence: During an Israel Defense Force operation to reopen the Egyptian-blockaded Straits of Tiran, Khan Yunis was occupied by Israeli soldiers, and according to a UN report, 135 local residents and 140 refugees were shot in the search for people in possession of arms.
Split into simpler sentences: During an Israel Defense Force operation to reopen the Egyptian-blockaded Straits of Tiran, Khan Yunis was occupied by Israeli soldiers, who shot shot dead hundreds of refugees and local residents. According to a UN report, 135 local residents and 140 refugees were shot in the search for people in possession of arms.