Hamas's armed wing says the fate of Israeli-American hostage Edan Alexander is unknown after the group found the guard holding him killed. The armed-wing accuses Israel's army of being responsible for the killing of hostages. Talks between Hamas and U.S. hostage negotiator Adam Boehler last month focused on the release of Alexander, believed to be the last living American hostage held by Hamas in Gaza. Israel aims to release the remaining 59 hostages in Gaza, while Hamas insists on a deal to end the war before freeing hostages.