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Associated Press Photo

This May 2018 image made available by Marine Traffic shows the MT Front Altair in Antwerp, Belgium. Two oil tankers near the strategic Strait of Hormuz were reportedly attacked on Thursday June 13, 2019. International Tanker Management, which operates the MT Front Altair, said an explosion caused fire aboard but that the incident is still being investigated. (Patrick Vereecke/Marine Traffic via AP)

Reports that two tanker ships have been attacked in the Gulf of Oman, near the strategic Strait of Hormuz, have focused new attention on the region as tensions have risen.

Here’s a look at the key waterway and its importance for the global economy.

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WHERE IS THE STRAIT OF HORMUZ?

The Strait of Hormuz is the narrow mouth of the Persian Gulf. It is in the territorial waters of Iran and Oman, which at its narrowest point is just 33 kilometers (21 miles) wide. The width of the shipping lane in either direction is only 3 kilometers (2 miles). It flows into the Gulf of Oman, where ships can then travel to the rest of the world. The strait is viewed as an international transit route.

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WHY IS IT IN THE NEWS?

Two oil tankers near the Strait of Hormuz were reportedly attacked on Thursday. In all, 44 sailors were evacuated from the vessels and the U.S. Navy has assisted amid heightened tensions between the United States and Iran.

The incident comes after the U.S. alleged that Iran used mines to attack four oil tankers off the nearby Emirati port of Fujairah last month. Iran has denied being involved. Meanwhile, Iranian-allied rebels in Yemen have increased their missile and drone attacks on Saudi Arabia, which has been at war in Yemen against the rebels since 2015.

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WHY IS THE STRAIT IMPORTANT?

One third of all oil traded by sea, which amounts to 20% of oil traded worldwide, passes through the strait.

Major OPEC energy producers Saudi Arabia, the United Arab Emirates and Kuwait use the strait to export oil to countries, mainly in Asia, including China, Japan, India and South Korea. The strait is also used to export gas worldwide from Qatar, the world’s biggest liquefied natural gas producer.

Anything affecting the narrow passage ripples through global energy markets, raising the price of crude oil. That then trickles down to consumers through what they pay for gasoline and other oil products.

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HOW MUCH IS THE PRICE OF OIL RISING?

The U.S. and international benchmarks for crude oil were up over 3% on Thursday after the news of the incidents against the two crude oil tankers. That’s a relatively big daily increase but it comes after a sustained drop in oil prices.

The Brent contract, for example, is at $62.17 a barrel. That’s up 3.7% on the day — but down from over $74 in late April. Prices have been declining on expectations that the global economy will slow, using less energy, as well as strong supplies. Analysts say that tensions in the Gulf region could push prices up again in the longer term, if they are protracted and there is a real threat to the flow of supplies.

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WHAT HAPPENS NOW?

How the U.S. and Iranian governments react to the event will be key. The United States has recently moved more military forces into the region, which already hosts the U.S. Navy 5th Fleet in Bahrain and the forward headquarters of the U.S. military’s Central Command at the vast Al-Udeid Air Base in Qatar.

Iran has set a July 7 deadline for Europe to find new terms for Tehran’s nuclear deal with world powers. That accord began to unravel after the Trump administration unilaterally withdrew from the Obama-era deal and re-imposed U.S. sanctions aimed at crippling the Iranian economy and pressuring a change in its regional policies. Iran has threatened it could resume higher levels of enrichment.