New Delhi, April 14 -- Negotiating teams from the United States and Iran could return to Islamabad later this week to resume talks aimed at ending the ongoing conflict, Reuters citing sources said on Tuesday.

The development follows the collapse of weekend negotiations in the Pakistani capital, which had raised concerns over the future of a fragile two-week ceasefire.

A source involved in the discussions reportedly said a proposal has been shared with both sides to redeploy delegations.

"No firm date has been set, with the delegations keeping Friday through Sunday open," a senior Iranian source was quoted as saying by the news outlet.

The diplomatic push comes even as Washington escalated pressure by imposing a blockade on Iranian por...