A deadline for resolving a 12-year-old dispute over Iran's nuclear program may be extended from Monday until March
U.S. Secretary of State John Kerry declined to make any predictions for what he called a "critical week" before a Nov. 24 deadline.
Israel's friends in Congress will kill any deal with Iran on nuclear proliferation.
"We've been disappointed in their failure thus far to constructively engage on this issue," Ambassador Laura Kennedy said.
Iran has acted to eliminate virtually all of its most sensitive stockpile of enriched uranium gas under a landmark nuclear deal with six world powers last year, an IAEA report says
Looming in the background of the talks have been threats by Israel to attack Iranian nuclear installations