Kidnappers snatched the mother of Nigerian Finance Minister Ngozi Okonjo-Iweala from her home in southeast Nigeria on Sundaym December 9, security sources and the minister's senior aide said, according to Reuters.

The abductors took the septuagenarian Kamene Okonjo from the family home in Ogwashi-Uku, Delta State, the minister's special adviser Paul Nwabuikwu said in a statement. Okonjo is the wife of the traditional ruler of Ogwashi-Uku.

A security source said it was not clear whether the motive was political or ransom-seeking. The source in Abuja said three people had already been arrested in connection with the kidnapping. He had no further details.

Nigeria is one of the worst countries in the world for kidnapping, a lucrative criminal enterprise worth millions of dollars a year. Abductions are most rife in the oil states, especially Delta state, where Okonjo-Iweala's family is from, but they are also common throughout the south, including in the commercial capital Lagos.

Kidnapping for political reasons is less common, though it does occur. Local newspapers carry a story about a new kidnapping almost every day, often of professionals or relatives of politicians, but rarely anyone as high profile as the finance minister's mother.