WASHINGTON — US President Donald Trump warned that American warplanes would soon bomb Iran for a third night in a row on Thursday, further dialing up the pressure after Qatari negotiators departed Tehran in search of an off-ramp to the war.Trump on Thursday also threatened a potential ground invasion of Iran.“The United States will be hitting Iran … VERY HARD TONIGHT,” Trump wrote on his Truth Social platform.“At some point in the not too distant future, we will be taking Kharg Island and other oil infrastructure points, and assume total control of their oil and gas markets, much like we have with Venezuela,” Trump wrote.Why it matters: The threats came just hours after Qatari mediators wrapped up talks that stretched into the early morning hours on Thursday in pursuit of a final draft agreement to end the war and bring the US and Iran back to the negotiating table.Trump’s latest threat came after the military said US Navy, Air Force and Marine Corps aircraft bombed Iranian air defense assets, communication systems and “military surveillance capabilities” across southern Iran near the Strait of Hormuz for the second night in a row — a move Defense Secretary Pete Hegseth described just prior to the strikes as intended to “enhance our diplomatic position” against Iran.Trump said earlier on Wednesday that Iran’s leaders had “taken too long” to accept the US’ terms for diplomatic talks.Iran retaliated for the US airstrikes on Tuesday and Wednesday by launching drones at countries that host US military facilities — Jordan, Bahrain and Kuwait — drawing condemnation from other Gulf states.What’s next: On Wednesday, Hegseth warned the US would continue the nightly strikes on Iran if no deal is reached.Trump has repeatedly threatened to authorize strikes on major civilian infrastructure in Iran, including the country's electrical grid and roads and bridges.The US airstrikes overnight into Wednesday destroyed two facilities that provide drinking water to some 20,000 civilians in and around Kuhestak, in Iran's southern Hormozgan along the coast of Hormuz, Iran's state broadcaster said.Speaking to reporters Wednesday outside CENTCOM headquarters at MacDill Air Force Base in Tampa, Florida, Hegseth dismissed a reporter's question as to whether deliberate strikes on Iran's civil infrastructure constitute war crimes.Know more: The US Navy is ratcheting up its strikes on commercial oil tankers accused of attempting to breach the US blockade of Iran’s ports.US aircraft fired missiles at three commercial oil tankers this week in the Gulf of Oman in a bid to disable them after CENTCOM said they had failed to abide by orders issued by American military forces.A US aircraft fired missiles at the engine room of the Guinea-Bissau-flagged tanker M/T Jalaveer on Wednesday, CENTCOM announced on Thursday morning. The Jalaveer was the ninth commercial vessel forcibly disabled by the US military since the Navy initiated the blockade in April.On Tuesday, a US F/A-18 fired missiles at another tanker, the M/T Settebello, in the Gulf of Oman as it “violated the ongoing blockade,” CENTCOM alleged.The strikes killed three civilian crew members, all Indian nationals, India’s government said Thursday. The Indian government said it summoned the US charge d’affaires in New Delhi in protest and called for an end to American strikes on civilian tankers.