Hisham ibn Abd al-Malik
According to one account, Al-Baqir was poisoned by Caliph Hisham ibn Abd al-Malik. Another account says Hisham died before managing to have him poisoned. A third account says al-Baqir's death was during the rein of al-Walid. Another account cited by Al-Shaykh al-Saduq says al-Baqir was poisoned by Umayyad Ibrahim b. al-Walld, during his brief rein.