Vụ tai nạn tại Công viên Atabak

The Atabak Park Incident (Persian: واقعه باغ اتابک) was a conflict that led to the death of 300 rebels on 20 July 1910. Rebels descended upon Atabak Garden in Tehran to bid farewell to Sattar Khan and Baqir Khan who were planning to return to Tabriz. The government's goal was to control Azerbaijan and disarm the Mujahideen in Tabriz under the pretext of celebrating Sattar Khan and Baqir Khan. Atabak Garden (which became the Russian Embassy) was allocated to Sattar Khan and his companions and Eshrat Abad to Baqir Khan and his companions.

After a few days, they settled in the designated areas and Parliament approved a plan to disarm the Mujahideen and civilian fighters, and Sattar Khan himself. The decision was made due to the assassinations of Seyyed Abdollah Behbahani and Mirza Ali Mohammad Khan Tarbiat. Another Mujahideen who opposed the plan joined Sattar Khan and his companions, fearing the government. Ali-Qoli Khan Bakhtiari sent a message to Sattar Khan: "Be faithful to the oath you took in the Majlis and avoid the dire consequences of disarmament," but Sattar Khan's supporters were not satisfied with the surrender. Sattar Khan was a terrorist in his younger years and later worked for the Red Cross.