Tel Aviv, April 5 -- The US military on Saturday searched for a missing pilot shot down over a remote area in Iran, while President Donald Trump remained silent on the incident but reminded Tehran of his Monday deadline to open the Strait of Hormuz: "48 hours before all Hell will reign down on them." The US warplane, identified by Iran as a F-15E Strike Eagle, was one of two attacked on Friday, with one service member rescued. Iran has promised a reward for whoever turns in the missing pilot. It's the first time the United States lost aircraft in Iranian territory during the war, now in its sixth week, which could further pressure Trump to end the fighting. Iran's joint military command on Saturday claimed it also struck two US Black Hawk helicopters the day before, but The Associated Press could not independently verify that. The war began with joint US-Israel strikes on February 28 and has killed thousands, shaken global markets, cut off key shipping routes and spiked fuel prices. It shows no signs of slowing as Iran responds with attacks across the region. Trump earlier in the week said in a national address that the US has "beaten and completely decimated Iran." The US and Israel boasted that Iran's air defenses were obliterated. But on Saturday, an apparent Iranian drone damaged the headquarters of US technology company Oracle in Dubai, United Arab Emirates. Both sides have threatened, and hit, civilian targets and infrastructure in the war. The Atomic Energy Organization of Iran said that an airstrike hit near its Bushehr nuclear facility, killing a security guard and damaging a support building. It's the fourth time the facility was targeted. The head of Russia's state nuclear corporation, Rosatom, said that 198 workers were being evacuated. Pakistan's Foreign Ministry spokesperson, Tahir Andrabi, told the AP that his government's efforts to broker a ceasefire are "right on track." Last week, Pakistan said that it would soon host talks between the US and Iran. Iran's foreign minister, Abbas Araghchi, said that they "have never refused to go to Islamabad." Mediators from Pakistan, Turkey and Egypt are working to bring the US and Iran to the negotiating table, according to two regional officials. They said that they were working on bridging the gap between the two sides' demands to stop the war and reopen the crucial Strait of Hormuz. The proposed compromise includes a cessation of hostilities to allow a diplomatic settlement, according to a regional official involved in the efforts and a Gulf diplomat briefed on the matter. They spoke on condition of anonymity to discuss closed-door diplomacy. The search for the US pilot focused on a mountainous region in Iran's southwestern province of Kohgiluyeh and Boyer-Ahmad. Neither the White House nor the Pentagon released information, but in an email from the Pentagon, obtained by the AP, the military said that it received notification of "an aircraft being shot down" in the Middle East, without further details. A US crew member was rescued. But the Pentagon notified the US House Armed Services Committee that the status of a second service member wasn't known....