Two Israeli soldiers were killed in a gun battle with Gaza militants in some of the fiercest fighting in the territory since Israel's military offensive there more than a year ago. The deaths were the first for the Israeli military in Gaza since January 2009. Four militants died in the clashes and in another exchange of fire nearby. Gaza's Islamic Hamas rulers announced that their gunmen were involved — marking a shift from the group's tendency over the past year to avoid confrontation with Israeli forces. The outbreak of violence in Gaza, which subsided by early evening, highlighted the region's...