Changes day to Monday in lead paragraph

LONDON, July 13 (Reuters) - Northwest European gasoline refining margins fell by $1.17 on Monday to $36.69 a barrel, but remained elevated amid low inventories and a tight market.

• A total of 6,000 metric tons of Eurobob E5 gasoline barges traded on Argus, with Trafigura and ATL selling to Gunvor.

• A further 8,000 metric tons of Eurobob 10 barges traded, sold by TotalEnergies to Varo and ExxonMobil.

• President Donald Trump said on Monday the United States was reinstating its blockade of Iranian shipping in the Gulf and would ensure the Strait of Hormuz stays open — for a fee — after the two sides exchanged more missile and drone attacks.

• Russia's seaborne oil product exports dropped by 27% on a daily basis in June month-on-month and by 37% from the same month a year ago to 5.7 million metric tons, as relentless drone attacks forced unplanned shutdowns at key domestic refineries, according to industry sources and Reuters calculations.

• Fuel shortages in Russia, triggered by Ukrainian drone attacks on its refineries, have reached Central Asian countries, which are dependent on supplies from Russia, traders and fuel market participants said.

• Russia's Syzran oil refinery on the Volga river has halted operations after a Ukrainian drone attack on July 12 damaged a primary processing unit, two industry sources said on Monday.