The Israeli army bombed Gaza and battled Hamas fighters on Tuesday as US top diplomat Antony Blinken was back in Israel on a regional tour aimed at stopping the war from escalating across the Middle East. The army said its forces had killed 40 militants over the past 24 hours in "expanded ground operations including air strikes" in Khan Yunis, and that troops had seized AK-47 assault rifles, rocket launchers and other weapons. Since the war broke out with the Hamas attack of October 7, fears have grown of an escalating conflict between Israel and its other regional enemies, a loose alliance of Iran-backed armed groups in Lebanon, Syria, Iraq and Yemen. Israel has traded cross-border fire with Hezbollah for three months and more recently killed senior operatives of the Shiite Muslim militant group as well as of Hamas on Lebanese soil, sparking anger and threats of retaliation. For in-depth analysis and a deeper perspective on the US Secretary of State's fourth Middle East tour since the war broke out, FRANCE 24's Nadia Massih is joined by Eberhard Kienle, Director of Research at the French National Center for Scientific Research (CNRS) and Professor of Political Science at SciencesPo.