Johannesburg - The Johannesburg High Court will hear on Thursday whether witnesses from Nigeria and the United States will testify in mitigation of Nigerian terrorist Henry Okah's sentencing.

At his last appearance on February 1, Okah's attorney Lucky Maunatlala asked for the postponement to give witnesses time to get to South Africa to testify.

Okah intended calling at least five people to testify.

He was found guilty in January of 13 counts of terrorism, including engaging in terrorist activities, conspiracy to engage in terrorist activities, and delivering, placing, and detonating an explosive device.

The charges related to two car bombs in Abuja, Nigeria, in which 12 people were killed and 36 injured on October 1, 2010, the anniversary of the country's independence.

They also involved two explosions in March 2010 in the southern Nigerian city of Warri. - Sapa