Gulf stock markets rose in early trading on Monday after US President Donald Trump signalled that new strikes on Iran were unlikely while talks to end their eight-month-old conflict continue.
Trump's remarks came despite reports from both countries that shipping had been attacked in or near the Strait of Hormuz, a vital waterway that carried nearly a fifth of the world's crude before the war.
Trump had earlier hinted at renewed attacks after last week's midterm elections, but no large-scale US military operation has followed, and Tehran has warned it would hit US and Israeli targets in response to any such move.
Saudi Arabia's benchmark index rose 0.1%, with Al Rajhi Bank gaining 0.6%, while Perfect Presentation For Commercial Services surged 7.7% following a rise in quarterly profit.
Meanwhile, Saudi authorities lifted an alert in Riyadh on Monday, a day after a Houthi attack damaged an Aramco office building in the city.
Dubai's main share index gained 0.8%, with blue-chip developer Emaar Properties advancing 3.2%.
In Abu Dhabi, the index was up 0.8%.
Anwar Gargash, a senior Emirati official, warned on Monday that the region may face a long period of instability as a comprehensive political deal between Washington and Tehran looked hard to achieve.
"We should ... prepare for a long period of uncertainty in which neither a decisive resolution nor stable regional order can be taken for granted," Gargash said in an address to a geopolitical conference in Abu Dhabi, the United Arab Emirates capital.
The Qatari index added 0.4%, led by a 1.8% rise in petrochemical maker Industries Qatar .