By Laila Bassam, Parisa Hafezi, Maya Gebeily and Tom PerryBEIRUT/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.

The deal in its current form is a deep disappointment to Israel's government, which has been sidelined in negotiations led by Pakistan and others.

Cracks appear in the US-Israel-Iran peace deal; Israel rejects Hezbollah's inclusion, while Iran gains leverage, potentially weakening US dominance.