Africa's largest mobile operator MTN says it is reviewing allegations that it paid protection money to militant Islamist groups in Afghanistan.
The allegations, made in a legal complaint filed in a US federal court on Friday, say the firm violated US anti-terrorism laws.
It was filed on behalf of families of US citizens killed in attacks in Afghanistan.
Five other companies were also named in the filing.
The complaint alleges MTN paid bribes to al-Qaida and the Taliban to avoid having to invest in in expensive security for their transmission towers.
Read more: BBC News
