Iran will soon deliver a counterproposal to the U.S. through Oman in response to what it called an "unacceptable" U.S. offer for a nuclear agreement, Foreign Ministry spokesperson Esmaeil Baghaei said Monday.

The spokesperson also called on the international community to force nuclear disarmament upon Israel, Iran's longstanding foe, which Tehran says is trying to thwart the nuclear negotiations.

"The U.S. proposal is not acceptable to us. It was not the result of previous rounds of negotiations. We will present our own proposal to the other side via Oman after it is finalized. This proposal is reasonable, logical, and balanced," Baghaei said.

"We must ensure before the lifting of sanctions that Iran will effectively benefit economically and that its banking and trade relations with other countries will return to normal," he added.

Reuters previously reported that Tehran was drafting a negative response to the U.S. proposal, which was presented in late May.