Oil prices ticked up in early Asian trading on Monday, firming up gains from last week when prices rose nearly 4% on the view that supply was tightening. Brent crude oil futures for May delivery inched up 3 cents to $85.37 a barrel. The April contract for U.S. West Texas Intermediate (WTI) crude was up 10 cents to $81.14. On Saturday, one of the strikes sparked a brief fire at the Slavyansk refinery in Kasnodar, which processes 8.5 million metric tons of crude oil a year, or 170,000 barrels per day. A Reuters analysis found the attacks have idled around 7% of Russian refining capacity in the first quarter. In the Middle East, Israeli Prime Minister Benjamin Netanyahu confirmed on Sunday he will proceed with plans to push into Gaza's Rafah enclave where more than 1 million displaced people are sheltering, defying pressure from Israel's allies. Lower interest rates would stimulate demand in the U.S., supporting oil prices. Both benchmark oil contracts finished last week nearly 4% higher despite a dip on Friday. Oil been rangebound for much of the last month, but on Thursday a bullish demand report from the International Energy Agency sent prices rising to their highest level since November. The agency, which represents industrialised countries, had strengthened its demand outlook for the fourth time since November as Houthi attacks in the Red Sea drove vessels to divert, increasing fuel consumption. For the first time, IEA also predicted a slight deficit this year, instead of a surplus. U.S. fuel demand also supported prices as refineries completed some projects.