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By Nick Edser
Business reporter
Attacks on commercial ships in the Red Sea risk pushing up the price of oil and other goods, analysts have warned.
Several firms have paused shipments through the route after vessels were attacked by Houthi rebels in Yemen.
The world's second largest shipping line, Maersk, has said it will reroute some of its vessels around the Cape of Good Hope.
The disruption has led US to launch an international naval operation to protect ships in the Red Sea route.
Countries joining the security group include the UK, Canada, France, Bahrain, Norway and Spain.
US defence secretary Lloyd Austin said: "The recent escalation in reckless Houthi attacks originating from Yemen threatens the free flow of commerce, endangers innocent mariners, and violates international law."
The Red Sea is one of the world's most important routes for oil and liquefied natural gas shipments, as well as for consumer goods.
BP, the oil giant, said on Monday that it will temporarily pause all shipments of crude through the key trade route.
Marco Forgiona, the director general at the Institute of Export and International Trade, told the BBC's Today programme the alternative route round the Cape of Good Hope could delay ships by about two weeks.
As well as the extra time, there were added costs for fuel and insurance, "and then you've got the issue that the ships are in the wrong place, the containers are in the wrong place and you get the potential for congestion at the ports and further delays", he said.
"So the impact of this on global supply chains cannot be overestimated."
S&P Global Market Intelligence said that nearly 15% of goods imported into Europe, the Middle East and North Africa were shipped from Asia and the Gulf by sea. That includes 21.5% of refined oil and more than 13% of crude oil.
A rise in oil prices can lead to higher inflation, which measure the pace of price rises. Inflation has been falling in the UK and are currently 4.6%.
New figures out on Wednesday will show whether it has continued to drop but, at the current level, it is still more than twice the Bank of England's 2% target. The Bank has, until recent months, been raising interest rates to cool inflation.
At the moment, changes to the oil price have been minimal. But Richard Meade editor-in-chief of Lloyd's, said: "What is going to be very interesting is if the tankers continue re-route and obviously yesterday saw BP start to reroute some of their ships around the Cape of Good Hope as well.
"That's a much more finely balanced market that could have serious implications for the global supply chain."
Houthi rebels have declared their support for Hamas and have said they are targeting ships travelling to Israel, using drones and rockets against foreign-owned vessels.
However, some firms such as Investor Chemical Tankers, whose MT Swan Atlantic vessel was attacked on Monday, said that their ship had no links to Israel, which is at war with Hamas following the attacks on 7 October.
Instead of using the Bab al-Mandab Strait, ships will now have to take a longer route navigating around southern Africa, around the Cape of Good Hope.