CAIRO: Israeli forces stepped up strikes across the Gaza Strip on Thursday, killing at least 25 people, Palestinian medics said, in further battle with Hamas-led militants as Israel braced for potential wider war in the region. Israeli airstrikes hit a cluster of houses in central Gaza’s Al-Bureij camp, killing at least 15 people, and the nearby Al-Nuseirat camp, killed four, medics said. Nuseirat and Bureij are among the densely populated enclave’s eight historic camps and seen by Israel as strongholds of armed militants.