President Donald Trump has threatened to rain "hell" on Tehran if it did not make a deal by the end of Tuesday that would allow traffic to start moving again through the vital route for global energy supplies.The Pakistani-brokered plan emerged from intense overnight contacts and proposes an immediate ceasefire, followed by negotiations on a broader settlement to be concluded within 15 to 20 days, a source aware of the proposals said on Monday.Pakistan's army chief, Field Marshal Asim Munir, was in contact "all night long" with US Vice President JD Vance, special envoy Steve Witkoff and Iranian Foreign Minister Abbas Araqchi, the source said.Iran won't reopen the Strait as part of a temporary ceasefire, a senior Iranian official told Reuters on Monday, adding that Iran won't accept deadlines as it reviews the proposal. Washington lacks the readiness for a permanent ceasefire, the official said.Axios first reported on Sunday that the US, Iran and regional mediators were discussing a potential 45-day ceasefire as part of a two-phase deal that could lead to a permanent end to the war, citing US, Israeli and regional sources.Trump: Deal must be made by Tuesday