Karbi Anglong Superintendent of Police Mugdhajyoti Dev Mahanta told PTI that the four prisoners of ward number 10 cut the rods of their cell and escaped during the early hours.
"They took advantage of the darkness outside as there was no electricity at that moment," he said.
Out of the four prisoners, two are charged with extortion, while one each are murder and theft culprits, he added.
"All of them were between 20-22 years of age, so they could escape easily through a small hole. We have launched an operation to nab them," Mahanta said.
Gogoi also directed Sarma to strengthen security in all the jails across the state.
He also directed the DGP to initiate measures to prevent recurrence of such incidents, it added.