In 1748, Mustafa Khan launched another invasion in Bihar, this time with the support of Maratha general
Raghoji I Bhonsle and Alivardi Khan's defected commander
Mir Habib who planned to invade Bengal. Zain ud-Din Ahmed Khan and his army initially repulsed the attack and shot Mustafa Khan dead. However, the rebels later got the upper hand in
Patna and assassinated Zain ud-Din Ahmed Khan on 13 January 1748. His two sons and wife
Amina Begum were subsequently imprisoned, and his father died of wounds 17 days later. after his death in 1748. The event was hosted by Nawab
Alivardi Khan. After pillaging various areas of the Bengal Subah,
Mir Habib advanced to
Murshidabad, the capital of Bengal and seat of the Nawab. The rebels were finally driven out by Alivardi Khan, who rescued Zain ud-Din Ahmed Khan's wife and two sons. His younger son,
Siraj ud-Daulah, succeeded him as the Naib Nazim of Bihar. ==References==