Pucca Qila Massacre
Pucca Qila Massacre was a coordinated massacre of Muhajir civilians conducted by Sindh police on the orders of the PPP-led Sindh Government. The massacre resulted in the deaths of more than 162 Muhajirs. The massacre resulted in the dismissal of the Benazir Bhutto government by President Ghulam Ishaq Khan, allegedly on the orders of Pakistan army. Background 
On 14 May, a dispute between different ethnic groups of students over special exam quotas escalated into clashes that spread to the entire city center and resulted in the deaths of three people and a curfew which was enforced which for eleven days. On the eleventh day, 25 May, the government sent the police, consisting of several forces from predominantly rural districts surrounding Hyderabad, to Pucca Qila, a muhajir dominated neighborhood, where they attempted to establish a police station within the walls of the citadel and to clear it of weapons. The police besieged the area, closed off all exits, entered houses in search of weaponry and shot at people breaking curfew and leaving their houses. Gun battles broke out between the police and MQM militants who had arrived to lift the siege and local MQM party workers who attempted to resist the searches, leading to an escalation of tension in Pucca Qila area. As a result of the siege, the water supply from the water tower in the citadel was cut off, disrupting the water supply in large sections of Hyderabad. Massacre 
On May 27, 10 o'clock, a rally of Muhajir women and children started marching from Latifabad to demand the restoration of water supply in Pucca Qila and lift of the 300 hour long siege. The procession, when challenged to stop, dared the police to open fire, because they were carrying the Holy Quran on our heads. The police opened fire, causing a stampede, with the muhajir women and children rushing into the Abdul Wahab Shah Jilani Shrine for shelter. Twenty-four ambulances arrived and carried off the dead and the wounded to nearby hospitals, first to Bhitai Hospital-which had only one operation theatre, so that the surgeons were obliged to operate in the corridors and then move the victims to the St. Elizabeth and Mohammadi hospitals. The massacre and siege ended when Pakistan Army moved into Hyderabad and dismissed the PPP-led government. Aftermath

Protests 
Protests broke out after the massacre where slogans of death were chanted to the administration, the President, Prime Minister, and the police. Demands for judicial inquiry 
 On 27 May 2017, the 27th anniversary of Pucca Qila, Muttahida Qaumi Movement – Pakistan demanded an independent inquiry into the 1990 Hyderabad Pucca Qila tragedy. Ouster of Benezir Bhutto 
The massacre resulted in a rift between Benazir Bhutto and COAS Mirza Aslam Beg and Altaf Hussain and that resulted in President Ghulam Ishaq Khan and General Beg dismissing Bhutto from office. References 

Genocide