Raw : This video shows Nigerian Islamist militant Mohammed Yusuf just before he was handed over to the police. Hours later, he died. The footage of the sect leader being interrogated by the army strongly implies that the he was not killed in battle, as initially reported by the authorities.

The details of 39-year-old cleric Mohammed Yusuf's death remain unclear. Blamed for the anti-state violence which saw five days of bloodshed in Nigeria's northern Borno state, Yusuf was killed by authorities on the afternoon of Thursday 2, his bullet-riddled body put on display outside the police station.

It was initially reported that he died during an exchange of fire. But inconsistencies between the police and the army revealed that he had actually been arrested and detained. It emerged that he had been found hiding in his wife's parents' goat pen in the town of Maidiguri, and arrested by the army, who then interrogated him - seen in the video - before handing him over to the police. It was after this that he died. The police deny responsibility for his death, however, saying only that he died trying to escape the authorities. On Wednesday President Umaru Musa Yar'Adua ordered an investigation into his death.