By Will Dunham

WASHINGTON, June 18 (Reuters) - While a city is not a living organism, it behaves very much like one. Its metabolic processes may be manifested in growth spurts, metamorphosis over time and even decay. Researchers using satellite imagery have tracked the vital signs of six major global cities, detecting a distinctive "urban pulse" in each.

The researchers looked at Dubai, Lagos, Mexico City, Mumbai, Seattle and Shenzhen using a new way to document dynamic changes unfolding in each of these cities in near real-time.

Switzerland confirmed Thursday that "initial negotiations" on implementing a US-Iran memorandum of understanding on ending the Middle East war were planned to take place at a Swiss resort complex on Friday.

"Currently, the plan remains for the United States and Iran, along with the mediators Pakistan and Qatar and other involved countries, to meet tomorrow at the Burgenstock for initial negotiations on the implementation of the agreement," the Swiss foreign ministry said.

LONDON, June 18 (Reuters) - Three Saudi-flagged supertankers with six million barrels of crude onboard sailed through the Strait of Hormuz hours after U.S. President Donald Trump signed a deal with Iran over an end to the conflict, ship tracking data showed on Thursday.

The sailings from Saudi ports were the biggest departures through the strait in weeks, according to Reuters analysis of shipping movements.

By Nidhi Verma, Siyi Liu and Joyce Lee

NEW DELHI/SINGAPORE, June 18 (Reuters) - Middle Eastern crude oil markets could come under further pressure if the Strait of Hormuz reopens on Friday following the U.S.-Iran interim deal, releasingmillions of barrels of oil stranded in the Middle East Gulf into global markets, industry executives said.

The wave of supply comes after Gulf producers ramped up exports via ship-to-ship transfers off the United Arab Emirates and Oman this month, which depressed spot differentials for Middle East crude to discounts on Tuesday.

By Olivia Le Poidevin

GENEVA, June 18 (Reuters) - The United Nations nuclear watchdog on Thursday welcomed the interim peace deal signed by Washington and Iran, saying it would now be involved in technical discussions to implement the agreement.

"It is good that the memorandum is there. Now the technical work starts," Rafael Grossi, the head of the International Atomic Energy Agency, told reporters in Geneva.

"Now it is for us to sit down with our American and Iranian colleagues and start formulating concrete steps that will have to be taken."

JERUSALEM, June 18 (Reuters) - Israel is holding negotiations with the U.S. as it seeks to continue its deployment of troops in southern Lebanon, two Israeli officials including a senior Israeli official close to Prime Minister Benjamin Netanyahu told Reuters on Thursday.

The officials, who spoke on condition of anonymity to discuss the sensitive talks, made the comments a day after the U.S. and Iran signed an interim pact that calls for parties to ensure "the territorial integrity and sovereignty of Lebanon."

BRUSSELS, June 18 (Reuters) - U.S. Secretary of Defense Pete Hegseth on Thursday harshly criticised some NATO members over defence spending and their stances on the Iran war as he announced a review of U.S. military forces in Europe.

"It's a review that some countries will fail, and others will pass with flying colors," Hegseth told NATO defence ministers gathered for a meeting at the alliance's headquarters in Brussels.

(Reporting by Phil Stewart, Sabine Siebold and Lili Bayer; Editing by Andrw Gray)

(Removes reference to package being worth $100 million)

HELSINKI, June 18 (Reuters) - Sweden, Norway and Canada will announce a new Prioritised Ukraine Requirements List (PURL) package to supply Ukraine with U.S. weapons, Sweden's Defence Minister Pal Jonson said in Brussels on Thursday.

(Reporting by Essi Lehto, editing by Terje Solsvik)

By Panu Wongcha-um

RANONG, Thailand, June 18 (Reuters) - Chaiyaporn Arunrasamee hunched over his fishing nets, overlooking the waters of the Andaman Sea, where Thailand's government is proposing an ambitious "Land Bridge" that will ferry goods between ports on opposite sides of the peninsula.

"Personally, I don't want it to happen at all," Chaiyaporn said of the project, which Thai Prime Minister Anutin Charnvirakul has resuscitated after the war in Iran and the closure of the Hormuz Strait highlighted countries' reliance on strategic maritime chokepoints.

Wall Street stocks bounced Thursday, pivoting back to buying mode after the pullback in the prior session prompted by a Federal Reserve policy outlook that signaled possible rate hikes ahead.

But the dollar continued to push higher in light of the Fed outlook, while oil prices were mixed as markets try to suss out when the reopening of the Strait of Hormuz will boost crude supply.