The update came after Pakistan's security forces reported on Wednesday morning that they had freed roughly 190 hostages.
By evening, officials said that roughly 30 insurgents had been killed as military and security forces started an air and ground attack to retake control.
They added that the isolated, hazardous terrain hampered communication and mobilization efforts.
On top of it, the BLA had allegedly stationed suicide bombers in explosive vests next to some of the hostages, using them as human shields.