RoydadNaft –  Brent crude futures rose $2.21, or 2.51 percent, to $90.31 a barrel. U.S. West Texas Intermediate (WTI) crude futures rose $1.83, or 2.19 percent, to $85.23 a barrel.

Oil prices were up more than 2 percent on Monday after the United States attacked an Iranian island in the Strait of Hormuz and Iran responded, extending the conflict into its sixth month.

Brent crude futures climbed $2.21, or 2.51 percent, to $90.31 a barrel as of 4:36 a.m. GMT. U.S. West Texas Intermediate crude was at $85.23, up $1.83, or 2.19 percent.

U.S. forces struck two launchers on Iran’s Larak Island in the Strait of Hormuz on Sunday, the first known American strikes on the country since late July. Iranian media reported on Monday, citing the Islamic Revolutionary Guard Corps, that Iran had attacked two U.S. air bases in Jordan in response.

U.S. President Donald Trump said in a brief social media post on Sunday that Iran’s energy hub of Kharg Island was being “blown to smithereens.” There was no evidence the island was under attack, and the post, which was accompanied by an AI-generated clip, included no further details.

Talks to end the conflict remain at an impasse while mediators work to reopen the Strait of Hormuz, through which a fifth of the world’s oil flowed before the war began in late February.

“We see more chances of contained confrontation rather than any sustained escalation in the conflict. What continues to be impacted with every flare-up are the timelines for Hormuz ‘reopening,’” said Suvro Sarkar, head of energy research at DBS.

“We were earlier hoping that we could be back to deal negotiations for the U.S. and Iran by the end of the third quarter, but that is looking more unlikely now. Thus, expect oil prices to remain range-bound in the $85–$95 per barrel range unless more clarity emerges on the situation in the Strait of Hormuz.”

Shipping data showed on Monday that the number of visible commodity vessels sailing through the strait over the weekend had dropped to five a day, reflecting caution among companies wary of attacks on ships.

The United Kingdom Maritime Trade Operations reported on Sunday that a tanker was struck by a projectile on Saturday while sailing inbound through the strait.

U.S. Treasury Secretary Scott Bessent told Reuters on Sunday that the United States is likely to issue new secondary sanctions on Iran weekly.

Brent and WTI are on track for small declines in August after falling more than 4 percent last week, their first weekly drop in three weeks.

Trump said on Sunday that oil from a recently struck deal with Venezuela will be used to replenish the U.S. Strategic Petroleum Reserve, which has fallen near its lowest level in 44 years.