The US-Iran peace deal could be in doubt after fresh Israeli strikes on Beirut.
In a post on X, Mohammad Bagher Ghalibaf, Iran's chief negotiator, said the strikes showed the US "either lacks the will to fulfill its commitments or lacks the capacity to do so".
"If you lack the will and the capacity to carry out your commitments, talking about continuing down this path is impossible," he added.
Iranian state media reported on Sunday that Tehran has not yet reached a final decision on the proposed peace deal to end the war between the United States and Iran.
US President Donald Trump and Pakistan, which has acted as a key mediator in the peace talks, had signalled on Saturday that a deal could be reached within the next 24 hours.
