 The organisation called for an investigation into his death, saying Sallah's colleagues suspected assassination because valuables were found on his body.The motive for Sallah's murder is unknown, but it occurred just preceding highly visible attacks by a Nigerian terrorist group.Just one day after Sallah's death, another journalist, Enenche Akogwu of Channels TV, was killed while reporting on a series of Boko Haram terrorist attacks.