An oil cargo delivered to the Philippines that Kpler had said last month originated from Iran was actually from Russia, the shiptracking firm said this week, Reuters reports.

Kpler data that had showed the Suezmax tanker Ocean Start delivered Iranian oil crude to Petron’s Bataan refinery on May 17 was revised to show the tanker delivered Urals crude from Russia, Kpler told Reuters.

The revision was due to a review of further information on the voyage, Kpler said.

Kpler’s revised data showed that the Ocean Start received the cargo in early May through a ship-to-ship (STS) transfer in waters off Singapore from the Suezmax ship Caruzo, which had loaded at Russia’s Sheskharis in late March.