924 Hajj caravan raid

In March 924, the Qarmatians of Bahrayn attacked and looted a caravan of Hajj pilgrims making their way back from Mecca to Iraq. The Qarmatians overcame the caravan's armed escort and took many pilgrims prisoner, along with the escort commander, Abu'l-Hayja al-Hamdani, before releasing them for ransom. The raid, along with a failure to prevent a sack of Basra a few months before led to popular unrest in Baghdad, and the deposition and execution of the Abbasid Caliphate's vizier, Ibn al-Furat.