Beirut, May 27 -- Israel's military clashed with the Iran-backed militant Hezbollah group on Tuesday along a strategic river in southern Lebanon as Israeli troops pushed farther north, days ahead of talks in Washington between Lebanese and Israeli delegations. One Israeli strike hit the eastern Lebanese village of Mashghara, killing 12 people, including several members of a family. A US-brokered ceasefire in thee Israel-Hezbollah conflict appeared more nominal by the day, complicating efforts at a broader peace in the Iran war as Tehran wants an agreement to include end to the fighting in Lebanon. The Litani River has been a de facto boundary in Lebanon, with large areas to the south under Israeli military control despite the ceasefire that...