Dozens of paintings, a silver tea set and other items belonging to Nelson Mandela's ex-wife Winnie will be auctioned to pay off debts she owes to a South African school.

A law firm representing the Abbotts School in Johannesburg says the auction will be held Tuesday at Winnie Madikizela-Mandela's home in the Soweto township.

South African media say Madikizela-Mandela defaulted on a $2,150 payment to the school, where a relative was studying. A court ruled against her in 2011. Her lawyer declined to comment.

Madikizela-Mandela, whose former husband became president after 27 years in prison, was an anti-apartheid leader in her own right.

In March, forensic experts exhumed two skeletons believed to belong to two young activists last seen at her home 24 years ago. No charges have been filed.