71 killed in Israeli attack on Iran prison, official says

Iran has not reached an agreement to return to negotiations with the U.S. on its nuclear program and no date for a potential meeting to re-start the negotiations has been set, the Iranian Foreign Minister Abbas Araghchi said on Iranian state TV Thursday.

Araghchi said speculation about negotiations resuming should not be taken seriously.

"I would like to state clearly that no agreement, appointment or conversation has been made to start new negotiations," Araghchi said.

Araghchi also said the negotiations between the U.S. and Iran will only be more difficult after the U.S. and Israel’s military actions.

"The next negotiations won’t be any easier for the Americans compared to the previous ones," Araghchi said. "Human beings have been killed for it. It’s not possible to make an agreement on it as easy as before."

Iran will not change its position regarding its nuclear program despite the military action taken by the U.S. and Israel, Esmaeil Baghaei, a foreign ministry spokesperson, told Iranian state media on Thursday.

"We have shown that pressure, intimidation, threats, and even the use of naked force against a sovereign state, in violation of all international standards and norms, cannot undermine our rights. Our rights remain intact," Baghaei told IRNA in a lengthy interview published Thursday.

Baghaei also addressed accusations that Iran was looking to prolong the negotiations with the U.S. that had been scheduled to take place in Oman before Israel attacked.

"All of these cases show that the American side was not serious about the negotiations from the beginning. But this does not diminish the value of the actions of the Islamic Republic of Iran. In my opinion, Iran's entry into these negotiations truly exposed the hypocrisy and lies of the other side," Baghaei said.

"History will record that in the midst of a diplomatic process between Iran and a party that considers itself a global power, Iran's logic prevailed, and they failed to meet this logic. For this reason, they encouraged and supported their proxy in the region to attack Iran," Baghaei added.

On the calls to resume negotiations with the U.S. over Iran’s nuclear program, Baghaei said, "First, we never trusted the other side. Because sometimes some words are used, such as 'the recent incident caused trust between Iran and America to decrease' or 'to disappear,' while we basically never trusted [them]. One of the reasons for this is the events that we are witnessing now. We were talking to the other side in an atmosphere of absolute distrust. The reason for this distrust is their history of breaking promises."

-ABC News' Othon Leyva

Israel achieved a great victory over Iran in the 12-day war, Israeli Prime Minister Benjamin Netanyahu said in a video statement in Hebrew Thursday.

"We fought valiantly against Iran -- and achieved a great victory. This victory opens up an opportunity for a dramatic expansion of the peace agreements. We are working hard on this," Netanyahu said.

"Along with the release of our hostages and the defeat of Hamas, there is a window of opportunity here that must not be missed. Not even a single day must be wasted," he added.

Separately, the Hostages and Missing Families Forum Headquarters issued a statement calling for a "comprehensive agreement" between Israel and Hamas to end the war in Gaza and bring the remaining hostages home.

"The era of partial deals is over," the Hostages and Missing Families Forum said in a release Thursday. "Why not leverage the achievements in Iran? This is the time for a comprehensive agreement."

"Upon assuming office, we were astounded to see how quickly a hostage deal came about," Udi Goren, cousin of hostage Tal Haimi, said in a statement released by the organization, addressing President Donald Trump directly. "But there’s one thing missing in order to move forward with your vision for the region: the deal of all deals - one that would bring ALL 50 hostages back and end the war."

-ABC News' Jordana Miller

Russian President Vladimir Putin said the situation in the Middle East is "calming down" and the conflict between Israel and Iran appears to be "in the past," in comments Thursday.

"This means that it will be possible to develop economic relations with all countries in the region, including Iran," Putin said.

In order to "preserve and consolidate the fragile truce" between Israel, Iran and the U.S., all parties need to return to the negotiating track as soon as possible, Russian Foreign Ministry spokesperson Maria Zakharova said in a statement Thursday.

"The settlement of the Iranian nuclear program, like the resolution of other crises in the Middle East, can only be achieved through diplomacy and negotiations. There is no reasonable alternative to this," Zakharova said in a statement, made in Russian.

"The specific practical initiatives put forward by the Russian President aimed at finding mutually acceptable solutions remain on the table. They have been communicated to all parties involved: the U.S., Israel and Iran," she said.

-ABC News' Tanya Stukalova and Anna Sergeeva