By Yuka Obayashi and Siyi Liu
TOKYO/SINGAPORE, Aug 6 (Reuters) - Oil prices climbed on Thursday as investors remained cautious on the outcome of Iran-Oman talks and whether they will restore flows via the Strait of Hormuz, while reports of attacks on Saudi tankers in the Red Sea and Gulf of Aden renewed supply tensions.
Brent crude futures gained 46 cents, or 0.58%, to $79.91 a barrel by 0640 GMT. U.S. West Texas Intermediate futures added 36 cents, or 0.48%, to $75.58 a barrel. Brent settled up slightly
on Wednesday, while WTI edged lower.
Iran and Oman have reached an understanding on the geographic coordinates for a shipping route through the Strait of Hormuz, and a joint announcement is being finalised, provided certain third parties did not interfere, Iran's Foreign Ministry spokesperson Esmaeil Baghaei said on Wednesday.
"The current diplomatic exchanges have merely raised hopes that tensions could ease," said Linh Tran, market analyst at XS.com. "Risks related to military activity, maritime transportation and oil supply from the Middle East remain firmly in place."
A proposed deal between Iran and Oman to help end the U.S.-Iran conflict would give Tehran control over ships entering the Gulf through the Strait of Hormuz, a senior Iranian source and two regional officials told Reuters on Wednesday, one of the biggest concessions yet to Iran.
There was no immediate U.S. comment on the proposal. While President Donald Trump has said a deal reopening the strait is imminent, U.S. officials have repeatedly insisted they would never agree to Iran controlling access to one of the world's most important trade routes for energy supplies.
Iran has warned Gulf states that any new U.S. attack on its territory would trigger retaliation against critical energy infrastructure across the region, according to five sources, as Tehran seeks to raise the cost of military action by threatening Washington's closest regional allies.
Prices have returned to the levels seen when the United States and Iran signed an interim peace agreement on June 17, with investors closely watching whether the two sides can reach a final deal, said Yuki Takashima, economist at Nomura Securities.
Takashima said concerns that Houthi attacks could hit Red Sea shipping were limiting optimism about the outlook for an end to shipping disruptions in the Middle East.
Yemen's Iran-aligned Houthis said on Wednesday they had launched a missile attack on a Saudi oil tanker off the coast of the kingdom's Red Sea port city of Yanbu and another missile attack on a Saudi oil tanker in the nearby Gulf of Aden. There was no confirmation from Saudi Arabia on either incident.
Gulf countries' crude oil and condensate exports were largely steady in July and remained about 40% below pre-war levels, shipping data showed.
Separately, U.S. crude stocks rose as refineries eased processing slightly and imports edged higher, data from the Energy Information Administration showed on Wednesday. [EIA/S]
(Reporting by Yuka Obayashi in Tokyo and Siyi Liu in Singapore; Editing by Sonali Paul and Lincoln Feast.)
