Israeli airstrikes have killed at least 11 people in Gaza, local officials say, including in a blast at a tent encampment housing displaced families. The IDF said the action was in response to ceasefire violations by Hamas . A fragile ceasefire between Israel and the militant group has existed since October, but more than 570 Palestinians have been killed since then, according to Gaza's Hamas-run health ministry. The latest strikes come just days before the first meeting of President Donald