TEHRAN — A deal to permanently turn a ceasefire into a lasting settlement still remains elusive as the conflict in the Middle East entered its 100th day on Sunday.

Mediation efforts have so far failed to produce any further agreements in a war that has strained the global economy and threatened food security in some of the world's most vulnerable countries.

In a fresh bid to restart negotiations between Iran and the US, Pakistan's interior minister was in Tehran on Sunday to deliver a message to Iranian Supreme Leader Ayatollah Mojtaba Khamenei from Pakistan's army chief Field Marshal Asim Munir, according to the Iranian state-run IRNA news agency.

The US and Iran have engaged in largely indirect negotiations for an interim deal to halt the three-month-old war that would leave issues including Iran's nuclear program to further negotiations.

Pakistani Interior Minister Mohsin Naqvi met with Iranian counterpart Eskandar Momeni late on Saturday, and held talks on Sunday morning with Foreign Minister Abbas Araghchi, according to official Iranian media.