Guwahati, June 23 (IANS): Four Karbi Peoples' Liberation Tigers (KPLT) cadres, serving prison terms in the District Jail at Diphu in Assam's Karbi Anglong district, managed to escape, jail authorities said on Tuesday.

"The incident took place on Monday night around 11.30 p.m. when guards noticed some of the iron railings of a prison were broken and four KPLT cadres missing," the jail authorities said.

"The four -- Joy Tisso, Charan Sing Teron, Harison Teron and Dutta Ingty -- were found missing," said the prison officials.

The jailbreak has raised concern as some of the top leaders of militant outfits like the United Peoples' Liberation Front (UPLF) are lodged in the District Jail, Diphu.

Meanwhile, Assam Chief Minister Tarun Gogoi has directed Assam Director General of Police Khagen Sharma to strengthen security in all the jails across the state following the jailbreak in Diphu prison.

Sharma has been asked to take all necessary steps to strengthen security in and around all the jails across the state and to initiate measures in right earnest to prevent recurrence of such incidents in future, an official said.

Gogoi also asked the state DGP to institute a probe into the jail-break and take strong disciplinary action against the officials responsible for the serious security lapse leading to the jail-break.