India, April 13 -- Iranians reacted with a mixture of disappointment and defiance on Sunday after peace talks with the United States failed to reach an agreement following hours-long negotiations.

US officials said the talks collapsed over what they described as Iran's refusal to commit to abandoning its nuclear program. Iranian officials blamed the US for failing to reach a deal, without specifying the sticking points.

The failure of the high-stakes talks in Pakistan after 21 hours casts doubt over the future of a fragile two-week ceasefire, due to expire on April 22.

Standing outside a newsstand in the capital, Tehran, Farhad Simia told The Associated Press he had hoped for successful negotiations and an end to the fighting, but stoo...