Pakistan, April 29 -- Efforts to secure a lasting peace in the Middle East remained uncertain on Tuesday as the United States (US) reviewed Iran's latest proposal aimed at easing tensions and reopening the Strait of Hormuz.

Read More: Trump unhappy with Iran peace proposal

Diplomatic progress appeared stalled despite a ceasefire holding between the parties involved in the regional conflict. Iran has maintained restrictions on the Strait of Hormuz, a critical global route for oil and gas shipments, since the start of the US-Israeli military campaign two months ago.

The blockade has disrupted global energy supplies and contributed to rising oil prices, increasing economic pressure worldwide. According to reports, Iran submitted written p...