Three more vessels have been hit ​by unknown projectiles in the Strait of Hormuz, maritime security and risk firms said on Wednesday, bringing the number of ships ‌struck in the region since the Iran conflict began to at least 14.

Shipping along the narrow strait has come to a near standstill since the United States and Israel began strikes on Iran on February 28, preventing exports of around a fifth of the world’s oil supply and sending global oil prices surging to highs not seen since 2022.

Iran’s ​Revolutionary Guards have warned that any ship passing through the Strait will be targeted. US President Donald Trump has threatened to ramp ​up US attacks on Iran if it continues to obstruct the strait.

The Thai-flagged Mayuree Naree dry bulk vessel ⁠was struck by “two projectiles of unknown origin” while sailing through the Strait on Wednesday, causing a fire and damaging the engine room, the ship’s Thai-listed ​operator Precious Shipping said in a statement.

“Three crew members are reported missing and believed to be trapped in the engine room,” Precious Shipping said.

“The company ​is working with the relevant authorities to rescue these three missing crew members,” it said, adding that the remaining 20 crew members had been safely evacuated and were ashore in Oman.

Images provided by the Thai navy showed smoke pouring out of the back of the ship.

Iran’s Guards said in a statement carried by the Tasnim news ​agency that the ship was “fired upon by Iranian fighters”, suggesting the first direct engagement by the Guards who have previously fired missiles or drones.

The ​US Navy has refused near-daily requests from the shipping industry for military escorts through the Strait of Hormuz since the start of the war on Iran, saying the ‌risk of ⁠attacks is too high for now, sources familiar with the matter told Reuters. Trump has said the US is prepared to provide naval escorts whenever needed.

Two other ships sustain minor damage

Earlier on Wednesday, the Japan-flagged container ship ONE Majesty sustained minor damage from an unknown projectile 25 nautical miles (46 km) northwest of Ras Al Khaimah in the United Arab Emirates, two maritime security firms said.

Its Japanese owner Mitsui OSK Lines and a spokesperson for Ocean Network Express (ONE), ​its charterer, said that the vessel ​was struck while at anchor in ⁠the Gulf and an inspection of the hull had revealed minor damage above the waterline.

All crew are safe, they said, adding that the vessel remains fully operational and seaworthy. The owner said the cause of the incident ​remained unclear and was under investigation.

A third vessel, a bulk carrier, was also hit by an unknown ​projectile approximately 50 miles ⁠northwest of Dubai, maritime security firms said.

The projectile had damaged the hull of the Marshall Islands-flagged Star Gwyneth, maritime risk management company Vanguard said, adding that the vessel’s crew were safe. Owner Star Bulk Carriers said the ship was hit in the hold area whilst anchored. There were no crew injuries and ⁠no listing.

The ​Guards’ statement included a reference to another ship, which it said was hit by projectiles - ​usually a reference to drones - on Wednesday morning. Reuters was not immediately able to confirm that report.