FILE - Yahya Sinwar, head of Hamas in Gaza, chairs a meeting with leaders of Palestinian factions at his office in Gaza City, on April 13, 2022. The war between Israel and Lebanon's Hezbollah — a Hamas ally backed by Iran — has intensified in recent weeks. Iran, which also supports Hamas, hailed Sinwar Friday as a martyr who can inspire others in challenging Israel. Biden said negotiating a stop to the fighting between Israel and Lebanon-based Hezbollah might be easier than forging a cease-fire between Israel and Hamas. Such infiltrations are relatively rare, especially as Israel has ramped up border security since the Hamas attack in October 2023.