Iran's Foreign Ministry spokesperson Esmaeil Baghaei said in a Monday press conference that the transferral of the country's enriched uranium stockpiles abroad as part of any future peace deal "is not on the Islamic Republic's agenda."

Baghaei said Tehran is reviewing a U.S. proposal conveyed by Pakistan's army chief during a recent visit, but rejected media speculation about the details of the offer.

"The country's definitive position is to preserve nuclear achievements within Iran's territory and the claims made in this regard are completely denied," Baghaei said.

Discussing continued disruption to shipping in the Strait of Hormuz, Baghaei also said that the "normalization of traffic is not possible," citing what he said were "repeated violations of the ceasefire and threats to Iranian ports and ships by the U.S."

-ABC News' Somayeh Malekian

The spokesperson for Iran's Khatam al-Anbiya Central Headquarters -- the country's top joint military command -- said in a statement on Monday that Iran would respond to the U.S. "aggression" against an Iranian merchant vessel in the Gulf of Oman, Iranian state television reported on Telegram.

Iranian forces will take "necessary action" in response to the American seizure of the M/V Touska on Sunday, the spokesperson said.

-ABC News' Somayeh Malekian

Chinese Foreign Ministry spokesperson Guo Jiakun on Monday expressed concern over the U.S. disabling and seizing the Iran-flagged M/V Touska cargo vessel on Sunday.

Guo said at a press conference that the "relevant parties" should take a "responsible attitude," while reiterating that the Strait of Hormuz is an "international strait" and that "unimpeded passage" is a "common interest of the international community."

The Touska's most recent port may have been Klang, Malaysia, but before that it departed from Zhuhai in southern China.

-ABC News' Karson Yiu

Iranian Foreign Ministry spokesperson Esmaeil Baghaei said Monday that Iran has not yet made any decision regarding a potential new round of peace talks with the U.S. in Islamabad.

"As of now that I am here, we have no plans for the next round of negotiations," Baghaei said in a press conference, as quoted by Iran's semi-official Tasnim News Agency.

Referring to the possible continuation of talks in Pakistan, Baghaei said, "We have clearly announced the red lines and unacceptable items from the beginning, and insisting on them will not change our principled positions."

Baghaei told reporters that the U.S. and Israel are to blame for the ongoing disruption in the Strait of Hormuz.

"The international community must hold these two actors accountable for making the region insecure," Baghaei said, adding that U.S. conduct "has shown that it is not serious about pursuing the diplomatic process."

Baghaei cited ongoing Israeli strikes in Lebanon, the U.S. blockade of Iranian ports and Sunday's seizure of an Iranian cargo vessel as "clear examples" of "aggressive acts."

Baghaei added that the repeated U.S.-Israeli strikes on Iran over the past nine months have undermined Tehran's trust in American diplomacy.

-ABC News' Somayeh Malekian