Nov 22 (Reuters) - Saudi Arabia"s stock market had its biggest intraday fall in over a year on Monday as it extended losses from the previous session following drone attacks. The Saudi-led coalition fighting the Houthi movement in Yemen said its air defences destroyed a drone targeting Najran airport in the south of Saudi Arabia, state media reported on Sunday. read more Yemen"s Iranian-aligned Houthi movement said on Saturday it had fired 14 drones at several Saudi Arabian cities, including at Saudi Aramco facilities in Jeddah. read more Saudi Arabia"s benchmark index (.TASI) fell 2.7%, its biggest intraday fall since Oct. 2020, with Al Rajhi Bank (1120.SE) down 4.5% and Saudi National Bank (1180.SE), the kingdom"s biggest lender, retreating 3.7%. The Saudi-led coalition said it detected indications of an imminent danger to navigation and global trade south of the Red Sea, Saudi state media reported early on Monday. read more Among other losers, Aramco (2222.SE) dropped 1.8%. The oil giant was also under pressure after India"s Reliance Industries Ltd (RELI.NS) said on Friday it had decided with Aramco to reevaluate Aramco"s proposed roughly $15 billion investment in Reliance"s oil-to-chemicals (O2C) business. read more However, Nayifat Finance Company (4081.SE), a consumer-focused Islamic finance firm, ended at 35.25 riyals per share, 3.6% above its initial public offering price of 34 riyals. Dubai"s main share index (.DFMGI) slid 2.6%, weighed down by a 4.3% decline in blue-chip developer Emaar Properties (EMAR.DU) and a 3.5% retreat in Emirates NBD Bank (ENBD.DU). The Qatari index (.QSI) fell 0.9%, hit by a 2.8% drop in petrochemical maker Industries Qatar (IQCD.QA). Oil prices, a major influence on the Gulf regions" financial markets, fell as rising COVID-19 cases in Europe and a potential release of Japanese oil reserves raised concerns about both oversupply and weak demand. In Abu Dhabi, the index (.ADI), edged up 0.1%, helped by an increase in Alpha Dhabi Holding (ALPHADHABI.AD). Beyond the Gulf, Egypt"s blue-chip index (.EGX30) gained 0.8%, as most of the stocks on the index rebounded, including top lender Commercial International Bank (COMI.CA).