Oil prices rose amid signs that demand this year may be stronger than expected, while the Israeli offensive in Syria threatens to expand conflict in the Middle East.

West Texas Intermediate crude advanced as much as 1.6% to trade above $84, reaching the highest intraday price since October 30. Industrial activity in China rebounded in March, snapping a five-month decline, raising expectations that oil consumption in the world’s largest crude importer may rebound, while Goldman Sachs Group said it was witnessing resilience in European demand.

Meanwhile, an Israeli airstrike on the Iranian embassy compound in Syria killed a senior military commander, according to state media reports, raising the risk of escalation.

In the United States, tightening supplies at the main storage hub in Cushing, Oklahoma, led to higher barrel prices in the short term. Traders said the so-called cash price for WTI, meaning the price of barrels for immediate delivery in Cushing, was trading at a premium of $1.50 a barrel on Monday, the highest level since early March.