The former leader of Nigeria's armed group has said he was arrested because he refused to tell the group to retract a statement claiming responsibility for last week's deadly attacks in the capital, Abuja. Henry Okah, currently being held in jail in South Africa, told Al Jazeera on Tuesday that he received a phone call from a 'close associate' of Goodluck Jonathan, the Nigerian president, telling him to urge the Movement for the Emancipation of the Niger Delta (Mend) to withdraw its claim for the bombings, which killed at least 10 people and left 36 others injured on the 50th anniversay of Nigeria's independence.