Oil prices climbed Monday after a vital US pipeline was put out of action by a cyber attack, while iron ore and copper hit historic peaks on demand optimism as economies reopen.

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Oil rose after the weekend attack hit the Colonial Pipeline Company, the largest in the United States and which ships gasoline and jet fuel from Texas to the East Coast, serving 50 million consumers.

The US government declared a regional emergency Sunday, while the company was unable to say when operations would return to normal.

In reaction, New York’s WTI crude and London Brent oil both gained about 0.8 percent in value on Monday.

“Energy markets were unnerved by a cyber attack on a major US pipeline operator,” said Interactive Investor analyst Richard Hunter.

“As a result, the oil price added to the gains which were already being seen on higher anticipated demand.”

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The attack comes as prices were pushing higher in response to an expected jump in demand as the world economy gets back on track as a result of the easing Covid health crisis.

Both Brent and WTI crude have gained more than 30 percent in value since the start of the year on burgeoning optimism over a post-Covid demand recovery.

Commodities also charged higher Monday in part owing to dollar weakness, which makes raw materials priced in the currency cheaper for buyers using rival units.

“Commodities are powering higher on Monday, supported not only by the weaker US dollar but also by reopening optimism and hope of large-scale infrastructure spending in both US and China,” said OANDA analyst Sophie Griffiths.

“China’s benchmark iron ore rallied … to a record high, and copper also reached a fresh record high.”

Iron ore forged new highs above $220 a tonne, while copper struck an all-time peak at $10,747.50 per tonne — having already hit records last week.

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Elsewhere, Europe’s main stock markets slid in early afternoon trading, while Asian equities finished mixed.

The pound shot more than one percent higher against its main rivals after the Scottish National Party fell short of an outright majority in UK regional elections.

That result is “leading most analysts to predict that London will be able to delay a new Scottish independence referendum for at least a few years, reducing the near-term risk of a break-up of the UK and the detrimental impact such an outcome is likely to have on the value of the currency,” said ActivTrades analyst Ricardo Evangelista.

Wall Street opened mixed, with the Dow picking up from a record close on Friday to move 0.5 percent higher and close in on the 35,000 point level.