Dubai: The Saudi navy has captured three members of Iran’s Revolutionary Guard Corps (IRGC) from a boat seized last week as it approached the kingdom’s offshore Marjan oilfield, the Saudi information ministry said on Monday.

Relations between the two countries are at their worst in years, with each accusing the other of subverting regional security and support opposite sides in conflicts in Syria, Yemen and Iraq.

“This was one of three vessels which were intercepted by Saudi forces. It was captured with the three men on board, the other two escaped,” a statement from the ministry’s Centre for international communications said.

“The three captured members of the Iranian Revolutionary Guard are now being questioned by Saudi authorities,” it said, citing a Saudi official.

The vessel, seized last Friday, was carrying explosives and intended to conduct a “terrorist act” in Saudi territorial waters, it said.

An earlier report from the Saudi Press Agency said the Saudi navy had fired warning shots at the two boats that managed to escape.

Iran’s Tasnim news agency said on Saturday that Saudi border guards had opened fire on an Iranian fishing boat in the Gulf on Friday, killing a fisherman. It said the boat was one of two Iranian boats fishing in the Gulf that had been pushed off course by waves.