The negotiation are aimed at ending a six-week conflict between the United States and Iran that has killed thousands across the Middle East and disrupted global energy supplies, contributing to rising inflation and slower economic growth.

The arrival of the U.S. delegation marks a key step in diplomatic efforts to de-escalate the conflict, with Washington and Tehran expected to begin negotiations shortly in the Pakistani capital.

Pakistan has implemented heightened security measures in Islamabad as it hosts the talks, which are seen as a critical opportunity to stabilize the region and address broader economic fallout linked to the war.

The Tripoli-based Libyan Interior Ministry said the recovered ordnance included an M-62 Russian-made missile weighing about 250 kg and remnants of a 130 mm rocket.

The ministry said the site had been secured and the munitions handled according to technical and safety procedures.

After the fire last week, the National Oil Corporation redirected crude from Sharara via alternative routes, including the El Feel pipeline to Mellitah port and through the Hamada system to storage tanks in Zawiya.

Images released by the ministry showed debris near what appeared to be a damaged section of pipeline. Authorities did not immediately attribute responsibility for the incident.

The disruption forced a full shutdown of the El Feel oilfield since Thursday, according to engineers familiar with operations. One engineer said production is expected to resume within seven to ten days.

Sharara, with a capacity of 300,000 to 320,000 barrels per day, is among Libya’s largest oil producing fields and is connected to the Zawiya refinery west of Tripoli. El Feel typically produces between 80,000 and 90,000 barrels per day under normal conditions.

Fragile energy infrastructureLibya’s oil sector has faced repeated disruptions since the 2011 uprising that toppled Muammar Qaddafi, with outages often linked to conflict, sabotage, or technical failures.

Sharara is operated by Acacus Oil Company, a joint venture involving National Oil Corporation and international partners including Repsol, TotalEnergies, OMV and Equinor.

El Feel is run by Mellitah Oil and Gas, a joint venture between NOC and Eni.

Air raid sirens sounded across Israel early on Sunday, warning of incoming Iranian missiles, after dozens of people were wounded overnight in separate attacks in the southern towns of Arad and Dimona. Israel’s military said it was carrying out strikes on Tehran hours after the Iranian attacks.

Trump on Saturday warned he would “obliterate” Iran’s power plants if Tehran did not fully reopen the Strait of Hormuz within 48 hours, marking a sharp escalation a day after suggesting the conflict could be wound down.

Iran responded on Sunday by warning it would strike U.S. infrastructure, including energy facilities in the Gulf, if Washington followed through on its threat. The warning came as U.S. Marines and heavy landing craft continued moving toward the region.

The exchange of threats has heightened fears that energy installations across key Gulf producers could become direct targets, widening the conflict beyond current theatres of engagement.

The escalating the crisis has disrupted markets, pushing fuel costs higher and intensifying concerns over global inflation. Analysts said the situation has introduced acute uncertainty into financial markets already strained by supply disruptions.

“President Trump’s threat has now placed a 48-hour ticking time bomb of elevated uncertainty over markets,” said Tony Sycamore, an analyst at IG.

He warned that failure to de-escalate could trigger sharp declines in global equities and further spikes in oil prices.

Oil prices rose on Friday to their highest levels in nearly four years after Iraq declared force majeure on oilfields operated by foreign firms, Israel struck a major Iranian gas field, and Tehran retaliated with attacks on neighbouring countries including Saudi Arabia, the United Arab Emirates, Qatar and Kuwait.

Iranian actions have effectively closed the Strait of Hormuz, a narrow passage that carries around a fifth of global oil and liquefied natural gas supplies, triggering what analysts describe as the most severe oil disruption since the 1970s.

The near-closure has also driven European gas prices sharply higher, with increases of up to 35% reported last week, reflecting the strait’s central role in global energy flows.

In a social media post late on Saturday, Trump reiterated his ultimatum, saying the United States would begin targeting Iran’s power infrastructure if the waterway was not reopened “fully” and “without threat” within the specified timeframe.