A Nigerian Federal High Court is ordering governments going back to 1999 to account for hundreds of millions in looted funds returned by foreign governments.

The Socio-Economic Rights and Accountability Project hailed the "landmark judgment" won through a freedom of information suit to shine light on an issue so obscure no one can even say how many billions of dollars are involved.

A statement Monday from the civil rights group says Friday's ruling orders the government of President Muhammadu Buhari to ensure that his government as well as those of Goodluck Jonathan, Umaru Musa Yar'Adua and Olusegun Obasanjo "account fully for all recovered loot."

Most was stolen by Nigeria's last military dictator, Gen. Sani Abacha. Hundreds of millions have been frozen by the United States, Switzerland, Britain, Luxembourg and Liechtenstein.