You know that the problem of sea piracy has blown completely out of control when even your mortal enemies are helping you out. According to this report from Somalia, pirates are now being fought by Islamist insurgents who are acting like vigilante privateers.

Dozens of Somali Islamist insurgents stormed a port on Friday hunting the pirates behind the seizure of a Saudi supertanker that was the world’s biggest hijack, a local elder said. . . .

The Sirius Star — a Saudi vessel with a $100 million oil cargo and 25-man crew from the Philippines, Saudi Arabia, Croatia, Poland and Britain — is believed anchored offshore near Haradheere, about half-way up Somalia’s long coastline.

“Saudi Arabia is a Muslim country and hijacking its ship is a bigger crime than other ships,” Sheikh Abdirahim Isse Adow, an Islamist spokesman, told Reuters. “Haradheere is under our control and we shall do something about that ship.”

Maybe the world’s shipping companies should start registering their vessels with Saudi Arabia, or another Muslim state.