By Laila Bassam, Parisa Hafezi, Maya Gebeily and Tom Perry

BEIRUT/DUBAI, June 17 (Reuters) - Iran's interim deal with the U.S. looks set to bolster Hezbollah's political and financial hand in Lebanon, with Tehran promising more funding for its ally once cash starts to flow, according to four sources familiar with ties between Tehran and the group.

A cash infusion to Hezbollah could help it recover from heavy wartime losses and deliver a setback to Israel, which dealt the Iran-backed group crushing blows in a 2024 war and has campaigned against sanctions relief for Tehran.