A senior military adviser to Iran’s Supreme Leader warned that negotiations have hit a standstill, stating that the US will enter a “dark corridor” of expanded regional warfare if peace talks fail.

The dispute has emerged as one of the central obstacles preventing progress toward a memorandum of understanding between Tehran and Washington, which would be just the first step.

Iran demands $12 billion in frozen assets released before signing a deal with the US, while Washington rejects unconditional sanctions relief ahead of