Iran accused the United States of violating three clauses of its 10-point negotiating framework on April 8, less than a day after the ceasefire took effect and two days before formal talks are due to begin in Islamabad.

In an English-language statement published by Mohammad Bagher Ghalibaf, Speaker of Iran's Parliament and de-facto power, he said "the very 'workable basis on which to negotiate' has been openly and clearly violated, even before the negotiations began," warning that "a bilateral ceasefire or negotiations is unreasonable" under such conditions.

The statement cited three alleged breaches. It said the ceasefire in Lebanon, included in the first clause of the proposal, was not being observed. The statement noted that Pakistani Prime Minister Shehbaz Sharif had declared "an immediate ceasefire everywhere, including Lebanon and other regions, effective immediately."

Israeli Prime Minister Benjamin Netanyahu has said the agreement does not cover operations against Hezbollah in Lebanon, which Trump later allegedly supported, calling the events in Lebanon "skirmishes."

Second, Iran said a drone had entered its airspace and was destroyed over the city of Lar in Fars Province, "in clear violation of the clause prohibiting any further violation of Iran airspace."

Third, it said Iran's right to uranium enrichment, included in the sixth clause of the framework, had been denied.

"The deep historical distrust we hold toward the United States stems from its repeated violations of all forms of commitments, a pattern that has regrettably been repeated once again," the statement said.

The accusation came as Tehran's own forces were accused of striking Gulf states on the same day. Kuwait reported 28 Iranian drone attacks on oil and energy infrastructure, the UAE said its air defences were engaging incoming missiles, and Saudi Arabia intercepted nine drones.

Iranian Foreign Minister Abbas Araghchi earlier called Pakistan's army chief Field Marshal Asim Munir to raise Israeli ceasefire violations, while Iran's foreign ministry spokesman said the US bore responsibility for any Israeli breaches.

Iran's foreign ministry spokesman Esmaeil Baghaei said on the evening of April 8 that the United States bears responsibility for any Israeli violations of the ceasefire, state media reported.

"As stated in the initial tweet of the Prime Minister of Pakistan, the US commitment includes a cessation of fire on all fronts, and America has committed that it and its allies will observe the ceasefire on all fronts, including in Lebanon," Baghaei said.

"Responsibility for any violation of the ceasefire by the Zionist regime will fall on America as well as on this regime," he said.

The statement came after Iran's Foreign Minister Abbas Araghchi earlier called Pakistan's army chief Field Marshal Asim Munir to raise alleged Israeli ceasefire breaches in both Iran and Lebanon.

US and Iranian delegations are due to meet in Islamabad on April 10.