Pakistan, Sept. 1 -- Oil prices rose by about $1 on Tuesday as renewed US-Iran fighting increased fears of supply disruptions. Brent crude gained $1.05, or 1.2%, to reach $91.54 per barrel. US West Texas Intermediate crude rose $1.27, or 1.5%, to $87.03. The gains followed stronger increases during Monday's trading session. Brent and WTI both reached their highest levels in several days.

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The latest fighting has renewed concerns about energy infrastructure across the Gulf region. US President Donald Trump threatened further strikes against Iran after Sunday's attacks. Analysts said Iran could retaliate against US targets and regional energy facilities. Such attacks could...