Sources told that these prisoners were released under the administration of former chief minister of Sindh, Arbab Ghulam Rahim and since then they have disappeared.
Incumbent Chief Minister of Sindh, Qaim Ali Shah has sought the list of these prisoners and details of their crimes from the home department.
It was further said the list was sought so that a judicial commission or a high-level committee could be formed to investigate the matter.
Sources added that in the light of investigations action will be taken against the ones involved in facilitating release of these inmates.
The chief minister also held consultation with constitutional and legal experts in this regard.