Iran says Pakistan's army chief to visit Tehran on Monday

Pakistan's army chief Asim Munir will visit Tehran on Monday to continue efforts to bring peace and security to the region, Iran's foreign ministry spokesperson Esmaeil Baghaei said on Sunday, according to a statement by the ministry.

Pakistan has taken on a mediator role in negotiations between Iran and the US aimed at ending the war which began with US and Israeli strikes on Iran in February.

Two Pakistani government sources confirmed Munir's visit to Reuters. The first source said that Iran and Pakistan were in direct contact.

A second source said the talks would also address recent developments in the conflict, including US President Donald Trump's threat of tougher sanctions on Iran.

"He (Munir) will discuss peace under Islamabad's MoU, Trump’s warning and the situation after the Pakistan-Turkey-Saudi Arab Agreement and Houthi issues with Iranian leaders," the source said.

The visit comes amid heightened tensions as Iran threatens a military response to US plans for sanctions that could further put a strain on the Islamic Republic's ailing economy.

It will coincide with a Monday announcement on details related to the planned sanctions which US officials have said would be "the toughest sanctions in history" on Iran.

Trump had warned of economic consequences against any country that provided "any type of lifeline to Iran" as he seeks to isolate the Islamic Republic.

Oil shipments are at a virtual standstill in the Strait of Hormuz, with Tehran threatening to strike any unauthorized oil tankers that try to transit the vital waterway, and Iran's economy is already under immense pressure from sanctions.