LONDON -- The attacks on commercial ships in the Red Sea by Yemen鈥檚 Iran-backed Houthi rebels have rerouted trade that normally flows through the crucial corridor for consumer goods and energy supplies, a shift that's delaying shipments and raising transport costs.

The impact struck home Friday when electric car maker Tesla said it had to shut down its factory outside Berlin from Jan. 29 to Feb. 11 due to delays in supply chains, and as U.S.-led airstrikes hit what the U.S. navy said were Houthi missile and drone launch sites in Yemen.

Oil, natural gas, grain and everything from toys to electronics typically travel through the waterway separating Africa and the Arabian Peninsula en route to the Suez Canal, where usually 12 per cent of the world's trade passes.

Some of the world鈥檚 largest container shipping companies and oil giant BP have been sending vessels on longer journeys around Africa that bypass the Red Sea. In response to the growing impact to global trade, the United States and a host of other nations have created a new force to protect ships.

Here are things to know about the impact of the attacks on global shipping:

WHY ARE HOUTHIS ATTACKING SHIPS?

The Houthis are Iranian-backed rebels who seized most of northern Yemen and the country's capital of Sanaa in 2014. The following year, a Saudi-led coalition entered the conflict, seeking to restore Yemen's internationally recognized government to power.

The Houthis have sporadically targeted ships in the region, but the attacks have increased since the start of the Oct. 7 Israel-Hamas war. They have used drones and anti-ship missiles to attack vessels and in one case used a helicopter to board and seize an Israeli-owned ship and its crew.

They have threatened to attack any vessel they believe is either going to or coming from Israel. That's now escalated to apparently any vessel, with container ships and oil tankers flagged to countries like Norway and Liberia being attacked or drawing missile fire.

WHY IS THE RED SEA IMPORTANT?

The Red Sea has the Suez Canal at its northern end and the narrow Bab el-Mandeb Strait at the southern end, leading into the Gulf of Aden. It's a busy waterway with ships traversing the Suez Canal to bring goods between Asia and Europe and beyond.

In fact, 40 pert cent of Asia-Europe trade normally goes through the area, including a huge amount of oil and diesel fuel for import-dependent Europe. So do food products like palm oil and grain and anything else brought over on container ships, which is most of the world鈥檚 manufactured products.

In all, about 30 per cent of global container traffic and more than one million barrels of crude oil per day typically head through the Suez Canal, according to global freight booking platform Freightos Group.

HOW ARE HOUTHI ATTACKS AFFECTING TRADE?

Huge shipping container companies, including Maersk, are avoiding the Red Sea and sending their ships around Africa and the Cape of Good Hope. That adds a week to two weeks to voyages and increases costs for for shipping, fuel and more.

At least 90 per cent of the container ships that had been going through the Suez Canal are now rerouting around the tip of Africa, said Simon Heaney, senior manager of container research for Drewry, a maritime research consultancy.

The cost to ship a standard 40-foot container from China to northern Europe has jumped from US$1,500 to US$4,000, according to the Kiel Institute for the World Economy in Germany. But that is still far from the US$14,000 seen during the pandemic.

The delays contributed to a 1.3 per cent decline in world trade in December, reflecting goods stuck on ships rather than being offloaded in port.

鈥淭here will be initial shock and there will be possibly initial shortages of parts that will potentially slow up production,鈥 Heaney said.

But 鈥減retty soon,鈥 the system 鈥渨ill adjust to the new reality of having to go around the Cape鈥 and manufacturers have to prepare and plan for longer wait times, Heaney said.

He thinks the crisis is shaping up to last for months, but that shipping has more capacity 鈥 unlike during the pandemic 鈥 and lessons from that time mean companies have more inventory on hand. Plus, shipping costs are a tiny fraction of the value of items.

鈥淣oticeable consequences for consumer prices in Europe are scarcely to be expected, since the share of freight costs in the value of high priced goods such as consumer electronics is a fraction of a percent,鈥 said Julian Hinz, director of the Research Center Trade Policy at Kiel.

However, analysts at JP Morgan say that the cost increase could slow the recent decline in inflation: 鈥淲hile these cost increases are coming off low levels, they will reinforce the fading of recent deflationary dynamics for goods prices.鈥

WHAT DOES IT MEAN FOR OIL PRICES?

Crude prices rose about 4 per cent following the U.S.-led airstrikes. International benchmark Brent traded at around US$78 per barrel Friday, still down from about US$84 on the eve of the Oct. 7 Hamas attack on Israel.

鈥淲hile this puts upwards pressure on global oil prices, it is unlikely to represent a serious energy supply shock for now,鈥 Simone Tagliapietra, an energy analyst at the Bruegel think tank in Brussels, tweeted.

That could change if the Hamas-Israel and Houthi conflicts escalate and lead to trouble at the Strait of Hormuz at the southern end of the Persian Gulf, he said.

"That would have massive implications for global energy markets,鈥 Tagliapietra said.

And White House spokesman Andrew Bates said, "We are monitoring conditions鈥 on oil prices.

鈥淟et me be very clear," Bates said. "It is the Houthis who have been endangering the freedom of navigation in one of the world鈥檚 most vital waterways.鈥

HOW IS THE WORLD RESPONDING?

The U.S. is leading a security initiative to protect ships in the Red Sea that includes United Kingdom, Bahrain, Canada, France, Italy, Netherlands, Norway, Seychelles and Spain. The Houthis have no navy to impose a cordon, relying on harassing fire and only one helicopter-borne assault so far.

Friday's strikes killed at least five Houthi troops and wounded six, the rebels said, without elaborating on what was targeted. It was unclear how extensive the damage from the U.S. strikes were, though the Houthis said at least five sites, including airfields, had been attacked.

Associated Press writers Jon Gambrell in Dubai, United Arab Emirates, and Tara Copp, Lolita C. Baldor and Chris Megerian in Washington contributed.