Iran live updates: Trump to hold national security meeting Monday, officials say

Kremlin spokesperson Dmitry Peskov told reporters that Iranian Foreign Minister Abbas Araghchi is due to meet with Russian President Vladimir Putin on Monday, as part of the Iranian diplomat's visit to St. Petersburg.

"The significance of this conversation is hard to overestimate in terms of how the situation around Iran and in the Middle East is developing," Peskov said.

Putin will meet with Araghchi at St. Petersburg's Presidential Library, Peskov said.

President Donald Trump is expected to hold a meeting with key members of his national security team concerning the situation in Iran on Monday, according to two U.S. officials familiar with the plans.

The anticipated meeting comes as the Trump administration has grown increasingly bullish on the impact of its ongoing naval blockade of Iran's ports and increasingly skeptical that talks with Iran's current negotiators can yield the desired results, one of the officials said.

The official added that while Iran has proposed new terms for a deal to more permanently resolve the conflict between the countries over the weekend, those terms still appear to fall well short of the administration's red lines.

Iranian Foreign Minister Abbas Araghchi will meet with Russian President Vladimir Putin in St. Petersburg during his scheduled trip to Russia Monday, according to Iran's ambassador to Russia, Kazem Jalali.

"In continuation of the diplomatic jihad to advance the country's interests and amid external threats, the Foreign Minister of the Islamic Republic of Iran will meet with the President of Russia during his trip to St. Petersburg," Jalali said in a post on X Sunday afternoon.

It was a busy weekend for Araghchi, who traveled to Oman once and Pakistan twice before heading to Russia Sunday evening.

Iran's semi-official news agencies Fars and ISNA reported that Tehran conveyed written messages to the U.S. via Pakistani mediators, letters that addressed some of Iran's "red lines," including issues related to its nuclear program and the blockade of the Strait of Hormuz.

-ABC News' Claire Bower

Iran's main news agency IRNA reports that the country's top diplomat, Foreign Minister Abbas Araghchi, departed Islamabad, Pakistan, late Sunday for Moscow, where he'll discuss regional developments and bilateral Iran-Russia relations with senior Russian officials.

Iran's Ambassador to Moscow Kazem Jalali also posted on Telegram that Araghchi hopes to meet with Russian President Vladimir Putin during his visit Monday.

-ABC News' Claire Bower and Anna Sergeeva