Iran has continued exporting limited volumes of liquefied petroleum gas and jet fuel despite a U.S. naval blockade aimed at cutting off the country’s energy trade, according to shipping intelligence and vessel-tracking data.

At least eight LPG tankers and one jet-fuel tanker have carried Iranian products since mid-July, with cargoes moving toward destinations including Myanmar and ports around Malaysia. Some shipments were ultimately believed to be bound for China. Six of the vessels identified by Reuters are already under U.S. sanctions.

The movements show that Tehran is still finding ways to move refined products even as the blockade has sharply reduced its larger crude-oil trade.

Much of the activity relied on ship-to-ship transfers near Oman, allowing Iranian cargoes to be shifted between vessels before continuing toward Asian markets. Vessel-tracking firms have also warned that location spoofing and other deceptive shipping practices complicate efforts to determine exactly how much product is getting through.

President Donald Trump has repeatedly described the blockade as effectively giving Washington control over maritime access to Iran.

“We have a blockade up there right now, and only ships that we want to get through get through,” Trump said in July. He said Iran did not control the Strait of Hormuz and argued that U.S. naval forces could prevent vessels from reaching Iranian ports.

Trump reiterated that position in late August, saying the Strait was open but under U.S. control and that the blockade was preventing Iran from exporting oil. The White House said at the time that 75 vessels attempting to breach the blockade had been turned around and nearly 1,500 commercial vessels had moved through the Strait under U.S. protection.

U.S. enforcement has also become kinetic. On Oct. 10, a U.S. fighter disabled the Panama-flagged Ocean Molica in the Gulf of Oman after U.S. Central Command said the vessel ignored warnings while attempting to breach the blockade after departing an Iranian port. The strike disabled the ship’s propulsion without injuring its crew, according to the U.S. military.

The blockade has nevertheless been highly effective against Iran’s main crude trade. Energy intelligence data showed Iranian seaborne crude exports fell to zero in September and remained at zero into October.

The LPG and jet-fuel shipments identified by Reuters therefore represent leakage around the blockade rather than a broad restoration of Iranian exports. Smaller product cargoes, ship-to-ship transfers and obscured vessel routing appear to offer Tehran more flexibility than conventional crude shipments departing Iranian terminals.